Merge "Use actual resizability for split-screen operations" into rvc-dev am:...

Merge "Use actual resizability for split-screen operations" into rvc-dev am: 058a713a am: affc0e64 am: 20f63988

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11854827

Change-Id: Ibc6a20635f0be5f4bd555c72403e06a6302a1621