Fix launch app crash could stuck system ui render thread.

Do not play reveal animation if the launching app is crashed. When
requesting the reveal animation, the splash screen window will need to
request traversal in system ui process, however, since the starting
window will be removed from WM, the VRI#reportDrawFinished transaction
will never being apply, which will stuck the system ui render thread
until dequeue buffer timeout.

Also fix a crash issue that the window which request to start reveal
animation might be removed already, we should skip to create the
animation leash by checking whether the window was removed.

Bug: 236931014
Bug: 229853681
Test: enable shell transition, repeatly launch the test app which will
crash at onCreate. Verify no ANR on systemui process.

Change-Id: I3fa4b5f231780d0b4e7ab9ab9070167768e5a122