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: ef6d79a5 am: 5a2f2cf7

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

Change-Id: If6a620c91b83566099181b7ce2a8d10c3ad0250f