Merge "Keep splitting tasks in the background with shell transition" into...

Merge "Keep splitting tasks in the background with shell transition" into udc-dev am: 026f3296 am: 93a17a19 am: 2ec19d5a am: 2fc9263b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22994256



Change-Id: Ic85632785be2fd49af95e18589f5b266538b7650
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>