Preset remote animation proc for transient launch

So RecentsTransitionHandler#startAnimation ->
setRunningRemoteTransitionDelegate doesn't need to enter wm lock.
That can avoid the latency to notify IRecentsAnimationRunner#
onAnimationStart, e.g. if it is not preset, the set-running-remote
may be blocked by surface placement for several milliseconds.

Reference: I137fcdff3cb5658aad5f7452c33bbc8d70f42398

Bug: 275508603
Test: TransitionTests

Change-Id: Ifa772d7576c42163af2c64a14cee684d117c0b43