Merge "DO NOT MERGE Enable hiding system bars by side when IME appears." into rvc-qpr-dev am: 2d1d3d0897

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12586399

Change-Id: I9908b9fad134141160c662a5ea8c567a3c67f335