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: cd86ac58 am: fdda6890 am: 7f75107f

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

Change-Id: I9d70b2c4fdb5fadefd38615543de4df32469ae8b