Before, when the organizer binder died, it will trigger TaskFragment removal that can cause surface placement. Now, we make sure to cleanup all pending events before removing organized TaskFragments. Bug: 251583070 Bug: 254322068 Test: atest WmTests:TaskFragmentOrganizerControllerTest Change-Id: Ifec6f763a7e7819c93cc28d71bd0314f3ac9ac0d