Merge "SCREEN_BRIGHTNESS - map 255 to current max" into sc-dev am: e4e836a1 am: 28c5f05a am: f4f3215d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15359296

Change-Id: Ic130c1b0d34fee425a05e001874330d27a19c738