[automerge] Config: fine tune the ambient threshold to improve the brightness 2p: 14150a77b9

Original change: https://googleplex-android-review.googlesource.com/c/device/google/raviole/+/16660935

Bug: 215655995
Change-Id: Id808cbec5c571cfba0f1d2a3db5934d1b691ef7e