18938 Move Surface and friends to flow/ (cla: yes, platform-android, platform-ios, waiting for tree to go green)

18950 fix iOS builds (cla: yes, platform-ios)

18966 updated FlutterViewControllerTest tests names (cla: yes, platform-ios)

19062 Instantiate image codec doc fix (cla: yes, platform-ios)

19068 [iOS] handle text plugin negative range (cla: yes, platform-ios, waiting for tree to go green)

19161 [iOS] text input methods to only call updateEditState once  (cla: yes, platform-ios)

19204 Revert “Add GetBoundingRectAfterMutations to EmbeddedViewParams to calculate the final bounding rect for platform view” (cla: yes, platform-ios)