Add a huawei auto-brightness rro using Mate 9's stock settings
diff --git a/overlay.mk b/overlay.mk
index 3c0dd72..38f1eec 100644
--- a/overlay.mk
+++ b/overlay.mk
@@ -1,4 +1,5 @@
 PRODUCT_PACKAGES += \
+	treble-overlay-huawei-backlight \
 	treble-overlay-NavBar \
 	treble-overlay-NightMode \
 	treble-overlay-Telephony-LTE \