Merge "Consider the source task while evaluating the launch-root-task" into...

Merge "Consider the source task while evaluating the launch-root-task" into sc-v2-dev am: cec3c3cb am: 4f090e0b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15824239

Change-Id: Ia0fa429b04649bd5535cda98c247740db2a0f54b