Hook up the backup data writer, and add a utility to read the backup data files.
diff --git a/tests/backup/Android.mk b/tests/backup/Android.mk
index 2e3385f8..0813c35 100644
--- a/tests/backup/Android.mk
+++ b/tests/backup/Android.mk
@@ -21,7 +21,7 @@
 LOCAL_SRC_FILES := \
     backup_helper_test.cpp
  
-LOCAL_MODULE_TAGS := user
+LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE := backup_helper_test
 LOCAL_SHARED_LIBRARIES := libutils
 
@@ -31,7 +31,7 @@
 # ========================================
 include $(CLEAR_VARS)
 
-LOCAL_MODULE_TAGS := user
+LOCAL_MODULE_TAGS := optional
 
 LOCAL_SRC_FILES := $(call all-subdir-java-files)