Prepares camera package for pigeon Swift migration as part of flutter/flutter#119109

Current implementation of `FormatUtils.selectBestFormat` overrides `MediaSettings.framesPerSecond`. With swift pigeon contracts `MediaSettings` is non mutable so that will no longer be possible.

## Pre-Review Checklist

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Replaces the Obj-C example app with Swift. Rather than attempt to modify the example in place, I started clean from the Swift template:
- deleted the ios/ directory.
- ran `flutter create --platforms=ios .` using current `stable` (3.38.9).
- re-did the [RunnerUITest setup process](https://github.com/flutter/flutter/blob/master/docs/ecosystem/testing/Plugin-Tests.md#enabling-xcuitests), and swapped in the existing test files for that and RunnerTest.
- ran native tests and the example app to capture the auto-migration steps for CocoaPods.

## Pre-Review Checklist

[^1]: Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling.

Roll Flutter from f916dd6887bf to e8f9dc50356d (34 revisions)

flutter/flutter@f916dd6...e8f9dc5

2026-02-08 [email protected] Roll Skia from 9325111e6ee4 to b7db9f35f0f2 (1 revision) (flutter/flutter#182062)
2026-02-08 [email protected] Roll Skia from 3167229206b5 to 9325111e6ee4 (1 revision) (flutter/flutter#182061)
2026-02-08 [email protected] Roll Fuchsia Linux SDK from sYqpDF9l9-kldd9_Q... to iqtwdXlgKIyZkL5Li... (flutter/flutter#182058)
2026-02-08 [email protected] Roll Skia from ae78024b261e to 3167229206b5 (1 revision) (flutter/flutter#182055)
2026-02-07 [email protected] Roll Dart SDK from ad6368edbe02 to 965b51c219d3 (1 revision) (flutter/flutter#182050)
2026-02-07 [email protected] Roll Skia from a471f253b941 to ae78024b261e (1 revision) (flutter/flutter#182049)
2026-02-07 [email protected] Roll Fuchsia Linux SDK from IOzzhWfhdzhu3zHsz... to sYqpDF9l9-kldd9_Q... (flutter/flutter#182043)
2026-02-07 [email protected] Roll Dart SDK from 02092faa97c5 to ad6368edbe02 (2 revisions) (flutter/flutter#182040)
2026-02-07 [email protected] Roll Skia from 9a983f6c2c06 to a471f253b941 (24 revisions) (flutter/flutter#182039)
2026-02-07 [email protected] Add buffer around rerasterized input to fragment shaders to maintain coordinate space when clipped (flutter/flutter#181743)
2026-02-07 [email protected] Update Flutter's style guide for dot shorthands and extension methods (flutter/flutter#181934)
2026-02-06 [email protected] Manual roll Skia from 39aa2a70213a to 9a983f6c2c06 (flutter/flutter#181986)
2026-02-06 [email protected] Update doc in foundation to match the style guide (flutter/flutter#181972)
2026-02-06 [email protected] Roll Dart SDK from ec674bdb3ae4 to 02092faa97c5 (11 revisions) (flutter/flutter#182017)
2026-02-06 [email protected] Roll Packages from c197455 to 7805d3e (4 revisions) (flutter/flutter#182016)
2026-02-06 98614782+auto-submit[bot]@users.noreply.github.com Reverts "[cupertino.dart] Implement CupertinoMenuAnchor and CupertinoMenuItem using RawMenuAnchor (#174695)" (flutter/flutter#182010)
2026-02-06 [email protected] Update Dart SDK to 3.12 beta1 (flutter/flutter#181948)
2026-02-06 [email protected] [cupertino.dart] Implement CupertinoMenuAnchor and CupertinoMenuItem using RawMenuAnchor (flutter/flutter#174695)
2026-02-06 [email protected] `flutter_tool` : Remove redundant enum types inside the enum definition scope (flutter/flutter#181910)
2026-02-06 [email protected] Roll pub packages (flutter/flutter#181973)
2026-02-05 [email protected] Roll Fuchsia Linux SDK from J2QdLcY2gyt4NP_xV... to IOzzhWfhdzhu3zHsz... (flutter/flutter#181971)
2026-02-05 [email protected] Directly generate a Mach-O dynamic library using gen_snapshot. [reland] (flutter/flutter#181539)
2026-02-05 [email protected] macOS: Implement tooltip window controller (flutter/flutter#180895)
2026-02-05 [email protected] Constrain RawAutocomplete options by soft keyboard (flutter/flutter#181930)
2026-02-05 [email protected] Roll Skia from 079d092f49e6 to 39aa2a70213a (1 revision) (flutter/flutter#181970)
2026-02-05 [email protected] perf: web ui loadFontFromList (flutter/flutter#181440)
2026-02-05 [email protected] Improve accessibility contrast for pre-test message (flutter/flutter#180469)
2026-02-05 [email protected] Roll pub packages (flutter/flutter#181965)
2026-02-05 [email protected] Roll Skia from 8543ce512d5c to 079d092f49e6 (8 revisions) (flutter/flutter#181964)
2026-02-05 [email protected] Add `clearError` API to Form and FormFieldState (flutter/flutter#180752)
2026-02-05 [email protected] Bump minimum required Xcode version to 15 and recommended to 16 (flutter/flutter#180531)
2026-02-05 [email protected] Rename "widgetTester" parameter to "tester" in "WidgetTesterCallback" (flutter/flutter#180944)
2026-02-05 [email protected] Roll Packages from 3bddf2c to c197455 (3 revisions) (flutter/flutter#181962)
2026-02-05 [email protected] Temporarily remove the Pixel 9/API 36 device from the Firebase Test Lab tests. (flutter/flutter#181956)

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