Tag appropriate AlarmManager intents with FLAG_IMMUTABLE am: 250828c0f4 am: 8b7fdda762 am: 45ab3179de

Original change: https://android-review.googlesource.com/c/platform/external/ims/+/1612237

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I683cda1d0dae42fd9056cb53456670f07fcec4b3
tree: 6144f9c97dacba62d2026b1007c5aac6f481f1a8
  1. rcs/
  2. METADATA
  3. OWNERS