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: 10d90e0f

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

Change-Id: Ic93f2a9d7cc8ef9b7ab7652b1c022bd2a8aeda3c