[automerger skipped] Merge "[RESTRICT AUTOMERGE] Make MultiClient IMMS PendingIntent IMMUTABLE" into sc-v2-dev am: 59f1ee6a36 am: 305274a6b0 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16170294

Change-Id: I45a64624aacc110e8c997827e7c99b3d18964f73