Remove Flag to clear allowlist duration

The flag has been soaked, but needs tobe removed to release the security
fix.

Bug: 322159724
Flag: EXEMPT bugfix
Test: atest PendingIntentControllerTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:fe247c242cf59433ae91efd85d0404e94df4dbe4)
Merged-In: I3b31e198dab43da2af24982993f1e7a6740f9210
Change-Id: I3b31e198dab43da2af24982993f1e7a6740f9210