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: 557189cf am: 46c86140

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

Change-Id: Ic756eb0f3e0d31e2127a7f1a9aeb56047e807e49