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 am: 85d1eb5a am: eb94603d

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

Change-Id: I3bd30ed440407314c9da3cc0ec3ee6ede10b2de3