Merge "Notify sysui of side swipe gestures that will show the bars...

Merge "Notify sysui of side swipe gestures that will show the bars transiently" into sc-v2-dev am: f80552b6 am: c80ff172

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16422448

Change-Id: Idd7e52ee5506e6dd1b955fc7824396a114f4a987