Merge "Add special label to denote dream in preview mode" into tm-qpr-dev am: c2127139

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21355979



Change-Id: I38521a146fed0baa5c95565dc2ac9a7057709dcc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>