Merge "Propagate launch root task for consecutive launch" into sc-v2-dev am:...

Merge "Propagate launch root task for consecutive launch" into sc-v2-dev am: 3a2efa41 am: a0802515

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15301153

Change-Id: Ia7abf656a2b5f9e4da386b1bb08f4417e69a57e0