Fix Proguard flags.
diff --git a/Android.mk b/Android.mk
index b4b44dd..befde7a 100644
--- a/Android.mk
+++ b/Android.mk
@@ -24,4 +24,6 @@
 LOCAL_PACKAGE_NAME := VisualizationWallpapers
 LOCAL_CERTIFICATE := shared
 
+LOCAL_PROGUARD_FLAGS := -include $(LOCAL_PATH)/proguard.flags
+
 include $(BUILD_PACKAGE)