[automerger skipped] DO NOT MERGE - Disallow deletion of channels with FGS notifications am: 2a33098b6c am: 33b7a223b1 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13533554

Change-Id: I22c1527c35e1ce08a286ac46295bd48bb375e4f7