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

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

Change-Id: Ie34cd4f32a2c1106a08f9c3a8be9e3b56d1c1aeb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>