Workaround for flicker between handoff from app to task view

- Defer finishing the recents animation for a couple frames until the
  frame has likely been pushed to sf and drawn, otherwise the reparenting
  of the app surface may happen before the task view is visible in
  Launcher.

Bug: 111299394
Test: Swipe up repeatedly from an app
Change-Id: I627dc085a5e376436b2b8eb5841c45fd36deff42