Fix StageCoordinator unexpected onDisplayAreaVanished

Seems already call Binder unlinkToDeath while registerOrganizer
but still received binderDied in DAOC, dead organizer already
been replaced by newer organizer with same featureId and will
remove the newer organizer.

Add a judge to make sure same organizer obecjt and old organizer
binder isn't alive while DAOC received binderDied.

Bug: 208552581
Test: run autotest pass

Change-Id: I555d2fdedb7be7b7d0e5b10fbc617a9cce66c4b5