62707 Fix text escaping in the AboutListTile sample code (cla: yes, f: material design, framework, waiting for tree to go green)

62712 Add onAppPrivateCommand to TextField (cla: yes, f: material design, framework, waiting for tree to go green)

62715 add benchmark for ChangeNotifier.notifyListeners (cla: yes, framework, team, waiting for tree to go green)

62729 Upadte systemNavigationBarIconBrightness docs (cla: yes, framework, waiting for tree to go green)

62741 Deprecate iOS13 style ActivityIndicator (cla: yes, f: cupertino, framework, waiting for tree to go green)