Merge "Reuse tasks in background in priority for split screen" into tm-qpr-dev...

Merge "Reuse tasks in background in priority for split screen" into tm-qpr-dev am: e9f622dc am: 1da31fbc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19950544



Change-Id: I066bc5688d24ac8c3bf0518e1a39a053c5254f56
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>