Merge "Limit the size of NotificationChannel and NotificationChannelGroup" into sc-v2-dev am: 80f3d5d722 am: 127f057855

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19696123

Change-Id: Ia97e0797514a6393bf719dac9a05e67fa217f94a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>