[automerger skipped] Merge "DO NOT MERGE Intercept back button on user...

[automerger skipped] Merge "DO NOT MERGE Intercept back button on user switcher screen" into rvc-qpr-dev am: de086933 am: 3ad96cbf -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13689637

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I746794a634d5fe72f1cccd937199d444e4659083