Merge "DO NOT MERGE - Disallow deletion of channels with FGS notifications" into rvc-dev am: 68a604b920 am: 1de72903d4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13533155

Change-Id: I132581d3f63bf06d9d230aa77f7493d12c8ae3bc