Make the app name "Files" instead of Documents.

This reduces the number of user visible names employed by the app by 1/3!

Bug: 29880363
Change-Id: I52bc8ea1b4437d96c32c4afba3a454ae74d06115
diff --git a/packages/DocumentsUI/res/values/strings.xml b/packages/DocumentsUI/res/values/strings.xml
index e67cc8a..c2d4d04 100644
--- a/packages/DocumentsUI/res/values/strings.xml
+++ b/packages/DocumentsUI/res/values/strings.xml
@@ -16,7 +16,7 @@
 
 <resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <!-- Title of the documents application [CHAR LIMIT=32] -->
-    <string name="app_label">Documents</string>
+    <string name="app_label">Files</string>
 
     <!-- Title of the standalone downloads activity. [CHAR LIMIT=32] -->
     <string name="downloads_label">Downloads</string>