Merge changes from topic "revert-b/404507270" into main

* changes:
  Revert "Prevent leak of transition leashes in RemoteAnimationRunnerCompat."
  Revert "Fix NPE when reparenting a leash that has already been released."
  Revert "Wrap reparent in a try-catch."
  Revert "Make leash cleanup on-demand instead of default."
  Revert "Set a relative layer instead of reparenting launch animations."