Ignore apply input transaction for removed activity.

Ignore to apply input trasaction for the activity which is removed
from window hierarchy, which might happen after a transition finished.

Bug: 236931014
Test: enable shell transition, launch an activity which will crash at
onCreate, and verify no system server crash after transition finish.

Change-Id: Icde817ab598ec08c1b9c42afd1394b8b1aba0327