I updated the error and warn versions in this PR: flutter/flutter#189109, which broke the flutter roll into packages. The legacy version was below the error version, so I upgraded the version to the error version (which is in the warn range).

Some helpful definitions:
[very low version, error version) --> in error range; app fails (legacy test fell in this range)
[error version, warn version) --> in warn range (warning logs)
[warn version, some very modern version) --> safe range (no logs)

Fixes: flutter/flutter#189218

## Pre-Review Checklist

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…#189229)

I raised the warn and error version in this PR:
flutter#189109. The dependencies used by
`flutter_engine_group_performance` were not updated as a part of that
PR. I missed that update earlier, and I'm guessing that
`flutter_engine_group_performance` is post-submit test.

Fixes flutter#189228 

## Pre-launch Checklist

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- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
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…12169)

Manual roll Flutter from 91939cc4db78 to dc2a8703e12b (50 revisions)

Manual roll requested by [email protected]

flutter/flutter@91939cc...dc2a870

2026-07-09 [email protected] [ios,macos] Update swiftc.py flags to match swiftc (flutter/flutter#189174)
2026-07-09 [email protected] [AGP 9] Update Warn Version to AGP 9+ (flutter/flutter#189109)
2026-07-09 [email protected] Sync CHANGELOG.md from stable (flutter/flutter#189203)
2026-07-09 [email protected] [web] Roll Chrome to 145 (framework) (flutter/flutter#182861)
2026-07-09 [email protected] Roll Packages from 52d84d6 to 20928d5 (6 revisions) (flutter/flutter#189194)
2026-07-09 [email protected] [web] Avoid absolute positioning for base CanvasKit canvas (flutter/flutter#188337)
2026-07-09 [email protected] Roll Dart SDK from cdb7217e65aa to a11fb7ed40a5 (6 revisions) (flutter/flutter#189195)
2026-07-09 [email protected] Fix dereference of nullptr in the moved-to-rect signal in the Linux embedder (flutter/flutter#189152)
2026-07-09 [email protected] Fix data for design packages (flutter/flutter#189140)
2026-07-09 [email protected] Roll Skia from 7b42d1251d54 to ab3a7b98c94d (2 revisions) (flutter/flutter#189181)
2026-07-09 [email protected] Roll Skia from 05d9d214e0b7 to 7b42d1251d54 (2 revisions) (flutter/flutter#189175)
2026-07-09 [email protected] Roll Skia from 542c8bdd7f4f to 05d9d214e0b7 (4 revisions) (flutter/flutter#189169)
2026-07-09 [email protected] UberSDF rect handling for thin (line-like) rectangles (flutter/flutter#188821)
2026-07-09 [email protected] Roll Skia from dd572c07f63c to 542c8bdd7f4f (4 revisions) (flutter/flutter#189160)
2026-07-09 [email protected] [flutter_tools] Fix hot restart for WASM web builds (flutter/flutter#187898)
2026-07-08 [email protected] Split FlViewRenderer into OpenGL and software backends (flutter/flutter#188824)
2026-07-08 [email protected] Promote android_hardware_smoke_tests out of bringup in CI (flutter/flutter#189081)
2026-07-08 [email protected] Roll Skia from 8df24be66531 to dd572c07f63c (4 revisions) (flutter/flutter#189150)
2026-07-08 [email protected] Expose LinuxWindowRegistrar on _window_linux.dart in order to better support out of tree LinuxWindowingOwners (flutter/flutter#188917)
2026-07-08 [email protected] Roll pub packages (flutter/flutter#189149)
2026-07-08 [email protected] fix(ci): harden some workflows (flutter/flutter#189087)
2026-07-08 [email protected] Roll Skia from 51a62da33da0 to 8df24be66531 (1 revision) (flutter/flutter#189139)
2026-07-08 [email protected] Roll Dart SDK to Dart 3.13 beta3 (flutter/flutter#189122)
2026-07-08 [email protected] [flutter_tools] Don't crash on non-UTF-8 plugin pubspec.yaml (flutter/flutter#188976)
2026-07-08 [email protected] [flutter_tools] Watch transitive #include headers for FragmentProgram hot reload (flutter/flutter#187945)
2026-07-08 [email protected] Roll Skia from 040d9f55de00 to 51a62da33da0 (1 revision) (flutter/flutter#189135)
2026-07-08 [email protected] Roll Packages from 92525f5 to 52d84d6 (7 revisions) (flutter/flutter#189134)
2026-07-08 [email protected] [flutter_tools] Forcefully kill hung subprocesses 5 seconds after timeout (flutter/flutter#187178)
2026-07-08 [email protected] Expose the app's build name and number as compile-time constants (flutter/flutter#187935)
2026-07-08 [email protected] Roll Skia from 1ff92f879815 to 040d9f55de00 (1 revision) (flutter/flutter#189131)
2026-07-08 [email protected] Roll Skia from 6137414bef5c to 1ff92f879815 (6 revisions) (flutter/flutter#189126)
2026-07-08 [email protected] [test cross imports] More test/rendering + flutter_test/test fixes (flutter/flutter#188954)
2026-07-08 [email protected] engine: explain why each candidate build was skipped in Flutter web loader (flutter/flutter#186254)
2026-07-08 [email protected] vscode: add missing unicode.h (flutter/flutter#189102)
2026-07-08 [email protected] Roll Fuchsia Linux SDK from 7RjQJBW3m-3Jl-7jr... to QcRFUtvCw2EobfJ8s... (flutter/flutter#189104)
2026-07-08 [email protected] Roll Skia from 075fbe4778d9 to 6137414bef5c (10 revisions) (flutter/flutter#189106)
2026-07-08 [email protected] engine: warn on WASM load failure when not crossOriginIsolated (flutter/flutter#186252)
2026-07-08 [email protected] Roll Dart SDK from c9bccc09e733 to db2155f56bf3 (2 revisions) (flutter/flutter#189105)
2026-07-08 [email protected] [flutter_tools] Prevent interactive device selection in machine mode (flutter/flutter#188267)
2026-07-08 [email protected] [flutter_tools] Fix wireless ADB device discovery when serial contains spaces (flutter/flutter#187943)
2026-07-07 [email protected] [web] Fix grouped autofill on iOS Chrome (flutter/flutter#187459)
2026-07-07 [email protected] Fix TextSelectionOverlay crash when layout is degenerate (flutter/flutter#188672)
2026-07-07 [email protected] [flutter_tools] Provision Android NDK in the main Gradle invocation (flutter/flutter#186337)
2026-07-07 [email protected] Android_hardware_smoke_test: Migrate to AGP 9 (flutter/flutter#189082)
...

Raised warn version to AGP 9.0.1 and error version to right before AGP 9
for upcoming stable release. This way, most Flutter Android developers
will upgrade their AGP version to 9.0.1, which means they will start
seeing the Built-in Kotlin migration warnings.

Since I intend on CP-ing this to beta, this PR contains the minimum
required changes to raise the warn version to AGP 9.0.1 and the error
version to 9.0.1. As in I changed
`packages/flutter_tools/gradle/src/main/kotlin/DependencyVersionChecker.kt`
and a lot of presubmits failed. All other changes had to be made in
order to pass presubmits. The following test projects (or tests with
projects) had minimal dependency upgrades in a while, so tests failed
because they fell below the error version:

-
`flutter/dev/integration_tests/module_host_with_custom_build_v2_embedding`
-
`flutter/dev/integration_tests/pure_android_host_apps/android_custom_host_app`
-
`flutter/packages/flutter_tools/test/integration.shard/test_data/deferred_components_project.dart`
-
`flutter/packages/flutter_tools/test/integration.shard/android_gradle_legacy_flutter_plugins_strings_in_comments_test.dart`
-
`flutter/dev/devicelab/bin/tasks/android_java17_dependency_smoke_tests.dart`
-
`flutter/packages/flutter_tools/test/android_java17_integration.shard/android_dependency_version.dart`

In this PR, I upgraded those dependency versions to the error version
(the minimum change required). In a future PR (issue
[here](flutter#189119)), I will align
those project dependency versions with the current template versions (or
at least a safer/modern version between the warn version and template
version).

## Pre-launch Checklist

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- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
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…#189229)

I raised the warn and error version in this PR:
flutter#189109. The dependencies used by
`flutter_engine_group_performance` were not updated as a part of that
PR. I missed that update earlier, and I'm guessing that
`flutter_engine_group_performance` is post-submit test.

Fixes flutter#189228 

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [AI contribution guidelines] and understand my
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- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
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- [x] All existing and new tests are passing.

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This was a manual cherry pick of #189109 and of #189229.

### Issue Link:
What is the link to the issue this cherry-pick is addressing?

#189228

### Impact Description:
What is the impact (ex. visual jank on Samsung phones, app crash, cannot ship an iOS app)?
Does it impact development (ex. flutter doctor crashes when Android Studio is installed),
or the shipping of production apps (the app crashes on launch).
This information is for domain experts and release engineers to understand the consequences of saying yes or no to the cherry pick.

This affects all Flutter Android apps and add-to-app integrations below the new warn and error version thresholds. Apps below the warn version will successfully build with warning logs urging an upgrade. Apps below the error version will fail to build and receive logs to upgrade.

New Warn Version
AGP: 9.0.1
Gradle: 9.1.0
KGP: 2.3.20

New Error Version
AGP: 8.11.1
Gradle: 8.14
KGP: 2.2.20

### Changelog Description:
Explain this cherry pick:
* In one line that is accessible to most Flutter developers.
* That describes the state prior to the fix.
* That includes which platforms are impacted.
See [best practices](https://github.com/flutter/flutter/blob/main/docs/releases/Hotfix-Documentation-Best-Practices.md) for examples.

< Replace with changelog description here >
[flutter/189383](#186100): When building Flutter Android apps and add-to-app modules using AGP < 9, the tool does not prompt developers to upgrade to AGP 9+ or log Built-in Kotlin migration warnings.

### Workaround:
Is there a workaround for this issue?

This change must be made. More develoeprs should upgrade to AGP 9+ to receive Built-in Kotlin migration warnings. To urge more developers to migrate to AGP 9+, we must raise the warn version to AGP 9+ to urge a larger chunk of our developers to migrate to AGP 9+. This must be done in this release because we don't have many Flutter releases left before AGP 10 releases.

### Risk:
What is the risk level of this cherry-pick?

### Test Coverage:
Are you confident that your fix is well-tested by automated tests?

### Validation Steps:
What are the steps to validate that this fix works?
To validate the new warn version:
- `flutter create` a new app
- change versions to just below the warn version AGP: 9.0.1, Gradle: 9.1.0 KGP: 2.3.20 in settings.gradle.kts
- `flutter build apk` and the build is successful but you will see logs urging you to upgrade.
- change versions to the warn version GP: 9.0.1, Gradle: 9.1.0 KGP: 2.3.20 in settings.gradle.kts
-`flutter build apk` and the build is successful and you will see no logs

To validate the new error version:
- change versions to just below the error version AGP: 8.11.1, Gradle: 8.14 KGP: 2.2.20 in settings.gradle.kts
- `flutter build apk` and the build will fail and you will see logs urging you to upgrade.
- change versions to the error version  AGP: 8.11.1, Gradle: 8.14 KGP: 2.2.20 in settings.gradle.kts
-`flutter build apk` and the build is successful and you will see no logs

If this change needs to override an active code freeze, provide a comment explaining why. The code freeze workflow can be overridden by code reviewers. See pinned issues for any active code freezes with guidance.

**Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed.