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: 0ed0e27c am: fd30f18b

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

Change-Id: I63318455a6e1e721b505dea96f610f0cf91cc74e