Fix Proguard flags.
diff --git a/tests/backup/Android.mk b/tests/backup/Android.mk
index 498ec40..31e2ec5 100644
--- a/tests/backup/Android.mk
+++ b/tests/backup/Android.mk
@@ -40,5 +40,7 @@
 
 LOCAL_PACKAGE_NAME := BackupTest
 
+LOCAL_PROGUARD_ENABLED := disabled
+
 include $(BUILD_PACKAGE)