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 am: 3e24e024

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

Change-Id: I2732df904fc2c6533852c878b506921ef2ec59d6