Merge "Handle the case where launch root is not attached" into udc-dev am:...

Merge "Handle the case where launch root is not attached" into udc-dev am: a7afe1ab am: 112457fc am: 7caf3577

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23317855



Change-Id: I436dada0b6bd7ef47ba3c44e0bb0b5c4a6cc4063
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>