[automerge] Update BrightnessTracker to use same sensor as ABC. 2p: 817d2df3a7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16638963

Bug: 209948220
Change-Id: I227859db20ee2ff8681df6708bc5af8a0cc1d64f