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

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

Change-Id: I188f25594329051c4a25f96476284e816e1163e8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>