Merge "Limit the size of NotificationChannel and NotificationChannelGroup" into sc-dev am: 6457ae8d4c am: 45b66cfb9a am: ce04557e62 am: 7229911787 am: feca9b2d0b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19697196

Change-Id: I6e19620578598c4ea415510b91fe97b4effb1a33
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>