* Roll Flutter Engine from 67254d6e4b03 to 8d83b98c55b3
* Roll Dart SDK from 35a9facce191 to e517487c5679 (Dart 3.0) (#38105)
* Bump SDK versions.
* Bump Dart SDK version constraints
* Update shrine package to 2.0.1 (null safe version)
* Fix more tests.
* Include patches from Jason for min android sdk version
* Fix analyzer warning
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.
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.
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.
