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: f4d976b5

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

Change-Id: I0a3aa1b7d750d6dd572c16e28237adeca5f6aec8