Generate progress events from app process for app animations.

Bug: 261654570
Flag: None
Test: atest BackNavigationControllerTest
Test: atest OnBackInvokedCallbackGestureTest
Test: atest BackAnimationControllerTest
Test: atest BackTouchTrackerTest
Test: atest WindowOnBackInvokedDispatcherTest

Change-Id: I075c099d59012825583fd9beda29a33d00f4d077
1 file changed