Merge "Add a flag to show/hide wallpaper dream." into udc-dev am: 2032ce62...

Merge "Add a flag to show/hide wallpaper dream." into udc-dev am: 2032ce62 am: 0718a68a am: ee149a84 am: 36af7661

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23697465



Change-Id: I78b72420a260459f181cb8e0c20a56dfd387753e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>