Synchronously revoke permissions on OTP session end when kill delay is 0

This addresses a race condition where a process could be restarted
before the delayed call happens, even when the delay is 0.

Test: manual
Bug: 221785285
Change-Id: I01c3c585cbd8d94e636ecaf439919014d8189d03
Merged-In: I01c3c585cbd8d94e636ecaf439919014d8189d03