Merge "Fix task root bounds be overwritten when dismiss split screen." into...

Merge "Fix task root bounds be overwritten when dismiss split screen." into rvc-dev am: 49ded461 am: 6f5e6799

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11818545

Change-Id: I9829427b6817ad001395d497d49364296fd48498