Merge "Notification text change should not be interruptive during post time"...

Merge "Notification text change should not be interruptive during post time" into sc-v2-dev am: 36a15a90 am: 28967d42

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16076774

Change-Id: I1544f874b27509dd63327f5c14ad8c88724b3e53