[wm] schedule animation instead of a full traversal at the end of a

transition

Fix a perf regression introduced by I9f0ff7153078d005a34db9c2d98bdbc9d36e9657
by only scheduling an animation. This will force an update
to the window framerate to fix an issue where the device was
stuck at max framerate after rotation.

Bug: 284271661
Fixes: 297321796
Test: see steps in bug
Change-Id: Icf89a08f567267f34f61475b36e5d0e8e7af46a0