65635 Revert “Reland “Make sure all isolates start during flutter driver tests”” (a: tests, cla: yes, framework, waiting for tree to go green)

65658 Make Navigator restorable (inkl. WidgetsApp, MaterialApp, CupertinoApp) (cla: yes, f: cupertino, f: material design, framework, waiting for tree to go green)

65659 [Material] Fix a jumping animation in the beginning of the extended Navigation Rail transition (cla: yes, f: material design, framework, waiting for tree to go green)

65660 Revert “Reland “Make sure all isolates start during flutter driver te… (a: tests, cla: yes, framework)

65662 Buttons animate elevation changes before changing background color (cla: yes, f: material design, framework, waiting for tree to go green)