Java less than 17 support for gradle stopped at gradle 8.14. https://docs.gradle.org/current/userguide/compatibility.html

Useful links
flutter/packages#3715
#124839
flutter/packages#3712 (comment)

Plugins will need need to set a minimum flutter version to 3.35. see packages/file_selector/file_selector_android/pubspec.yaml

Logic:
AGP 8.0 was the first AGP version to require java 17. https://developer.android.com/build/releases/past-releases/agp-8-0-0-release-notes
3.32 has a warn AGP version set to 8.3 but an error version set to 7.0 https://github.com/flutter/flutter/blob/3.32.8/packages/flutter_tools/gradle/src/main/kotlin/DependencyVersionChecker.kt#L94
3.35 has a error version of AGP set to 8.1.1 https://github.com/flutter/flutter/blob/3.35.4/packages/flutter_tools/gradle/src/main/kotlin/DependencyVersionChecker.kt#L103

Dart version updates also happen at the same time as flutter updates and the newer dart version has formatting changes.
Format changes can be made in the same pr that updates java compile options and sets the minimum flutter version.