Change 'data' label to 'data usage'.

Bug: 22350292
Change-Id: I70733b301e734213d2fdec5e7ffb62a7e30ef94c
diff --git a/res/xml/installed_app_details.xml b/res/xml/installed_app_details.xml
index 470e292..7ebdaf7 100644
--- a/res/xml/installed_app_details.xml
+++ b/res/xml/installed_app_details.xml
@@ -28,7 +28,7 @@
 
     <Preference
         android:key="data_settings"
-        android:title="@string/data_size_label"
+        android:title="@string/data_usage_summary_title"
         android:selectable="true" />
 
     <Preference