Generated by running `flutter update-packages --force-upgrade`

Updates vm_service to [12.0.0](https://pub.dev/packages/vm_service/versions/12.0.0) and dwds to [22.0.0](https://pub.dev/packages/dwds/versions/22.0.0)

The changes to `packages/flutter_tools/lib/src/isolated/devfs_web.dart` are for the new interface of DWDS introduced in https://github.com/dart-lang/webdev/pull/2243

FYI @bkonyi