Merge "Limit the size of NotificationChannel and NotificationChannelGroup"...

Merge "Limit the size of NotificationChannel and NotificationChannelGroup" into sc-v2-dev am: 80f3d5d7 am: 127f0578 am: a5b0ec0e

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



Change-Id: I04e32787b896eb18b6d6fec4330bb8ed07934023
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>