Merge "Adding logs and re-organized the logic of get root task" into tm-dev...

Merge "Adding logs and re-organized the logic of get root task" into tm-dev am: a2bfe5a6 am: 1e793f9d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17005171

Change-Id: I96060424ec791209e2938e4bf23efbf6125bf600