Merge "Adds way to hide the clock in lock screen preview." into tm-qpr-dev am: 7c1e07e5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21353673



Change-Id: I317c755dbcfae07b8c89b1be951e4fe57d907d71
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>