Merge "Fix task root bounds be overwritten when dismiss split screen." into rvc-dev am: 49ded46160 am: 6f5e679917

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

Change-Id: Ifd5f9cfce04ab35856e85d752706960b0cd00ed3