[flutter_releases] Flutter beta 3.22.0-0.0.pre Engine Cherrypicks (fl…

…utter#51851)

# Flutter beta 3.22.0-0.0.pre Engine

## Scheduled Cherrypicks

- Roll dart revision: dart-lang/sdk@9bf485fe0

DEPS

@@ -62,7 +62,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/main/DEPS
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': 'bb65648e20e29abc47acf3dd984518d29fd625c3',
+  'dart_revision': '9bf485fe0152511517d4123583088cd16fa468b2',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py