update a2 overlays
copy same props from 6x, and adjust value from a2 dumps
diff --git a/Xiaomi/MiA2/Android.mk b/Xiaomi/MiA2/Android.mk
new file mode 100644
index 0000000..9538385
--- /dev/null
+++ b/Xiaomi/MiA2/Android.mk
@@ -0,0 +1,8 @@
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+LOCAL_MODULE_TAGS := optional
+LOCAL_PACKAGE_NAME := treble-overlay-xiaomi-mia2
+LOCAL_MODULE_PATH := $(TARGET_OUT)/overlay
+LOCAL_IS_RUNTIME_RESOURCE_OVERLAY := true
+LOCAL_PRIVATE_PLATFORM_APIS := true
+include $(BUILD_PACKAGE)