[automerger skipped] Merge "DO NOT MERGE Prevent apps from creating blocked channel groups" into qt-dev am: f1dc5b1e am: 960d42c0 -s ours am: 2675838e -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16621952

Change-Id: I5e1696741554a2877099f3a9ee03247cb10cad11