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: 7422ef19

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

Change-Id: I4879e410a97e218b81bb71dc2beba797ff8e62dc