Cycle day editor and other confirmation dialogs.

Create dialog to edit "cycle day" when data usage resets.  Also added
dialogs to confirm enabling limit and restricting an application.

Change-Id: I1e08b17fabd1fcfc2f260807a61435d0ff1a8627
diff --git a/res/layout/data_usage_header.xml b/res/layout/data_usage_header.xml
index 4d8a5dd..8e6f054 100644
--- a/res/layout/data_usage_header.xml
+++ b/res/layout/data_usage_header.xml
@@ -23,7 +23,9 @@
         android:id="@+id/switches"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="vertical" />
+        android:orientation="vertical"
+        android:showDividers="middle|end"
+        android:divider="?android:attr/listDivider" />
 
     <LinearLayout
         android:layout_width="match_parent"