Merge "Don't create one-handed-background-panel after rotation" into sc-dev...

Merge "Don't create one-handed-background-panel after rotation" into sc-dev am: ab89e910 am: 19340641 am: b60af8ab

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15537318

Change-Id: I6b09144d2500031271f0a86ce6bfbe62b7c14118