[automerger skipped] Merge "DO NOT MERGE Handle back button for notification panel" into rvc-qpr-dev am: 7d4b625c am: d34e379a -s ours am: 01111440 am: bf25f91b -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13408029

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ie4ac6ff8e9ab7680f097c19ebf44f4bbfc43c3b2