DocumentsUI roots can have settings.

Roots use a flag to indicate they have settings, and DocumentsUI
offers to launch towards someone who handles a new Settings intent.

Slight rename of browse intent for clarity.

Bug: 19993667
Change-Id: I86302ec1cfac5e435d8bc5701bdb85fb9b0dcbae
diff --git a/res/menu/activity.xml b/res/menu/activity.xml
index b9b8054..5b944ab 100644
--- a/res/menu/activity.xml
+++ b/res/menu/activity.xml
@@ -60,4 +60,8 @@
     <item
         android:id="@+id/menu_file_size"
         android:showAsAction="never" />
+    <item
+        android:id="@+id/menu_settings"
+        android:title="@string/menu_settings"
+        android:showAsAction="never" />
 </menu>