Bug: https://github.com/flutter/flutter/issues/111193

This is to reopen the tree while jazzy installation is fixed.

Bug: https://github.com/flutter/flutter/issues/111193

* Migrate packages/flutter_tools/test/general.shard, part 1/2

* Fix most of the tests

* Fix analysis

* Fix analysis

* Fix test

* Fix analysis

* Fix analysis

* Fix nit

* Introduce tests for tristate checkboxes

* Initial

* Use tristate changes in engine

* Flutter_test matchers test update

* Comments, tests

* Update packages/flutter/lib/src/semantics/semantics.dart
Co-authored-by: Chris Bracken <chris@bracken.jp>

* Assert mutual exclusivity

* Assert valid state before updating state

* Update packages/flutter/lib/src/semantics/semantics.dart

Typo fix in comment
Co-authored-by: Loïc Sharma <737941+loic-sharma@users.noreply.github.com>
Co-authored-by: Chris Bracken <chris@bracken.jp>
Co-authored-by: Loïc Sharma <737941+loic-sharma@users.noreply.github.com>

* test commit

* Deprecate BottomAppBarColor field

* test commit

* Deprecate BottomAppBarColor field

* Update fix_data.yaml & tests

* remove text.txt

* Update PR ID values

* Update fix_data.yaml

* Make deprecation changes non-breaking

* Whitespace formatting

* Modify docstring, retain bottomAppBarColor default

* Modify theme_data_test.dart

* Update docstrings