Merge "Do not create starting window if there is no task." into tm-qpr-dev am:...

Merge "Do not create starting window if there is no task." into tm-qpr-dev am: 050781d7 am: 7fbe89ac

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18527307



Change-Id: I5f3dd5383e867d649b5156a3b547246c4a2fbed3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>