Merge "Remove unused system/extras/brillo_config/Android.mk" into main am: 9e99c449da am: c5f0e52d96

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/3132036

Change-Id: I14fd5b0c0cac3fd98e06686e4bfdce7b6d726b08
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>