This reverts commit f865ac7e.

* [flutter_tools] integration l10n tool

* add runtime skip to build system

* Update build_system.dart

* add links to issues, comments

* Update packages/flutter_tools/test/general.shard/build_system/build_system_test.dart
Co-authored-by: Shi-Hao Hong <shihaohong@google.com>

* Update packages/flutter_tools/lib/src/build_system/targets/localizations.dart
Co-authored-by: Shi-Hao Hong <shihaohong@google.com>

* Update localizations.dart

* switch to gen_l10n localizations

* fix tests
Co-authored-by: Shi-Hao Hong <shihaohong@google.com>

Fixes #56194

Remove caching of FlutterView and poll forever if the list of flutter views is empty. Added test for missing release mode logic.

This reverts commit 209bdcb6.

Remove caching of FlutterView. Perhaps the FlutterView RPC might return an empty list if the VM is not quite up yet? We had some old logic to poll the flutter views RPC for up to 200ms. That doesn't seem like a great approach, so instead we could forgo it entirely and trust that either the views come up before the developer tries to interact, or we crash.

Support bundling SkSL shaders into an android APK or appbundle via the --bundle-sksl-path command line options. If provided, these are validated for platform engine revision and then placed in flutter_assets/io.flutter.shaders.json

Finishes the gradual vm service migration by deleting the flutter tooling's vm_service

Move FlutterView and related RPCs to the package:vm_service implementation. Update some getIsolate calls with catchError to match previous behavior.

- Updates tests that were previously mocking FlutterViews to use real views
- Moves the FlutterView cache from VM to FlutterDevice
- Catch SentinelException during Isolate.kill

This reverts commit a18e6361.

This reverts commit 2e50fd75.

Move FlutterView and related RPCs to the package:vm_service implementation. Update some getIsolate calls with catchError to match previous behavior.

- Updates tests that were previously mocking FlutterViews to use real views
- Moves the FlutterView cache from VM to FlutterDevice
- Catch SentinelException during Isolate.kill

This reverts commit d6b09626.

This reverts commit 66d7a6c2.

Reland of #52149

Revert "[flutter_tools] Update background isolates when performing hot reload/restart (#52149)" (#52476)

This reverts commit edd03a1a.

When performing a hot restart, collect isolates without an attached flutter view and send a kill signal. These must have been spawned by running main, so restarting without removing them leads to isolate duplication.

When performing a hot reload, ensure that we send a reloadSources command to every isolate and not just uiIsolates.

Revert "[flutter_tools] Allow providing dart-defines to Android, iOS, macOS builds (#51714)" (#52041)

This reverts commit ee60eeea.