Merge "Enable dimming for mid-range luminance wallpapeprs." into sc-dev am:...

Merge "Enable dimming for mid-range luminance wallpapeprs." into sc-dev am: 4bb78410 am: 72adb9d0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14881020

Change-Id: I357862c94875110e53159945d15a9b15b8c4c1c4