Merge "Add new sysui-silver mapping" into udc-dev am: 13ff9889 am: bccf21d1 am: bb072783 am: b16fd82b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23468188



Change-Id: I883c2257a07a887b64898c99aad5b3e7d1430dec
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>