Revert "Defer destroy activity if it is in transition."

This reverts commit a27c81b6.

Reason for revert: DroidMonitor: Potential culprit for b/343671768 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Change-Id: I71066848540fa76a962395a7d38510d120cac782