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

Merge "Limit the size of NotificationChannel and NotificationChannelGroup" into rvc-qpr-dev am: a15093de am: 5415ede5 am: dc9fe11d am: eb814b0f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19696124



Change-Id: Id6f21dcc3a920e87a7f58bc901802043b2d3e6cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>