[automerger skipped] Add a limit on channel group creation am: c1b836562c -s ours

am skip reason: Merged-In Ic27efba4c54e22eebca16fc948879e652df4467b with SHA-1 38257af19e is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21096624

Change-Id: I26a78b8f1ded7bc08468587ceb55c0f163586011
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>