explicit set an "optional" tag
diff --git a/Android.mk b/Android.mk
index fced943..c117fc8 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,6 +1,8 @@
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
+LOCAL_MODULE_TAGS := optional
+
 LOCAL_SRC_FILES := $(call all-subdir-java-files)
 
 LOCAL_PACKAGE_NAME := Provision