Merge "Don't clear requested SysUI visibility if the source doesn't exist"...

Merge "Don't clear requested SysUI visibility if the source doesn't exist" into rvc-dev am: 9e1a5ebb am: d75315ca am: 1dc0f452

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11835421

Change-Id: Ic295f71eae024383f5bdac45d055b2e471553234