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

Merge "Limit the size of NotificationChannel and NotificationChannelGroup" into rvc-dev am: 04ccf69d am: 6155a177 am: c08dd8f0 am: 64c3c93c am: 4c475e70 am: cec5611e am: 08f8a5ce

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19697197



Change-Id: I425d157a8694edf5959739b7425c367f94820d04
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>