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: 2121d62c am: c30d4a18

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

Change-Id: I5aeadac674b84e7aee61c4d8765ec37c265dcdf6