61509 Add a E2E based performance test case (a: tests, cla: yes, framework, team, waiting for tree to go green)

61540 Promote WidgetTester.ensureVisible to WidgetController (a: tests, cla: yes, framework)

61579 Remove unused FlutterErrorDetails subclasses (a: debugging, a: error message, a: quality, a: tests, cla: yes, framework, waiting for tree to go green)

61773 Update framePolicy docs (a: tests, cla: yes, d: api docs, documentation, framework, waiting for tree to go green)

61841 Make sure all isolates start during flutter driver tests. (a: tests, cla: yes, framework, waiting for tree to go green)

61872 LiveTestWidgetsFlutterBinding support for non-touch event (a: tests, cla: yes, framework)