3e4e280914
This updates the implementation to use the stopwatch from the Clock object and piping it through to the TestWidgetsFlutterBinding so it will be kept in sync with FakeAsync. Relands https://github.com/flutter/flutter/pull/137381 which attempted to reland #132291 Fixes https://github.com/flutter/flutter/issues/97761 The original change was reverted due to flakiness it introduced in tests that use fling gestures. * https://github.com/flutter/flutter/issues/135728 It was reverted again due to a change in the leak tracking tests that broke it.