Merge "Let position of system bars can be restored by swipe" into rvc-dev am:...

Merge "Let position of system bars can be restored by swipe" into rvc-dev am: ac4e36b9 am: 5078e7a8 am: 7f17aba6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11612964

Change-Id: I035fc72c0a9ed60643c666d1477374780e13ce1e