* Update color scheme seed generation to use color utils package

Makes the android_semantics_testing test not fail for newer versions of Talkback.

Also, since the test now depends on pub_semver, upgraded the pubspec files.

The only substantive changes in the PR are in dev/integration_tests/android_semantics_testing/test_driver/main_test.dart

This adds a smoke test for every single API example. It also fixes 17 tests that had bugs in them, or were otherwise broken, and even fixes one actual bug in the framework, and one limitation in the framework.

The bug in the framework is that NetworkImage's _loadAsync method had await response.drain<List<int>>();, but if the response is null, it will throw a cryptic exception saying that Null can't be assigned to List<int>. The fix was just to use await response.drain<void>(); instead.

The limitation is that RelativePositionedTransition takes an Animation<Rect> rect parameter, and if you want to use a RectTween with it, the value emitted there is Rect?, and one of the examples was just casting from Animation<Rect> to Animation<Rect?>, which is invalid, so I modified RelativePositionedTransition to take a Rect? and just use Rect.zero if the rect is null.

- Update dwds and and the rest of the packages

Closes: https://github.com/flutter/flutter/issues/87100

The (new, not yet used) code gen for iOS was setting up a std::map from key codes to logical and physical key codes, but it was using uint32_t, which isn't big enough to hold the Flutter key codes.

Also, iOS needs to be able to filter out function keys, so I added a function key set.

* [web] move e2e tests from flutter/engine to flutter/flutter
* flutter update-packages --force-upgrade

Run flutter update-packages --force-upgrade to pick up a new version of vm_snapshot_analysis package which contains fixes for #76313

Fixes #76313

Ensure attaching to an application with an existing DDS instance is not treated as a fatal error (#70847)

* update pinned null safety deps

* run update-packages

* add http dep to devicelab package

* rerun update-packages

Updates all null safe dependencies to versions that allow 2.10 stable and 2.11 dev releases.

Also updates flutter_goldens and flutter_goldens_client to allow 2.11 dev.

PR #65873 enabled DDS for non-web Flutter applications. This change
surfaced a bug where DDS would not send ServiceRegistered events to VM
service clients when they subscribed to the Service stream. This would
cause tools and tests that rely on these events (e.g., hot reload in
VSCode) to fail.

Fixes #66038.

Update prepare_package.dart to use the process_runner package instead having duplicate code. (#62710)

Updates the prepare_package.dart script to use the process_runner package (which is where the ProcessRunner implementation was moved to).

This reverts commit c46aa360.

Update all versions, specifically file which fixes some bugs that caused tests to fail if run in different orders:

- systemTemp directories created by MemoryFileSystem will allot names based on the file system instance instead of globally.
- MemoryFile.readAsLines()/readAsLinesSync() no longer treat a final newline in the file as the start of a new, empty line.
- RecordingFile.readAsLine()/readAsLinesSync() now always record a final newline.