Merge "Allow non-doze dreams to be windowless" into udc-qpr-dev am: 1c18d7b8 am: d51bf6e0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23528116



Change-Id: I38edad19bc04b4908cc017c86381230d8011b2c2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>