Add a huawei auto-brightness rro using Mate 9's stock settings
diff --git a/Huawei/Backlight/Android.mk b/Huawei/Backlight/Android.mk
new file mode 100644
index 0000000..f254751
--- /dev/null
+++ b/Huawei/Backlight/Android.mk
@@ -0,0 +1,7 @@
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+LOCAL_MODULE_TAGS := optional
+LOCAL_PACKAGE_NAME := treble-overlay-huawei-backlight
+LOCAL_MODULE_PATH := $(TARGET_OUT)/overlay
+LOCAL_IS_RUNTIME_RESOURCE_OVERLAY := true
+include $(BUILD_PACKAGE)