Add an empty status fragment for status and suggestions.

Bug: 27927402

Also add a TabLayout to show title for these fragments, inspired by
http://goo.gl/aOt51Q

Change-Id: I40bab3075480670558ac9a896337109f10e8c90c

src/com/android/settings/InstrumentedFragment.java

@@ -31,6 +31,7 @@ public abstract class InstrumentedFragment extends PreferenceFragment {
     public static final int DASHBOARD_CONTAINER = UNDECLARED + 1;
     // Used by PreferenceActivity for the dummy fragment it adds, no useful data here.
     public static final int PREFERENCE_ACTIVITY_FRAGMENT = UNDECLARED + 2;
+    public static final int DASHBOARD_STATUS = UNDECLARED + 3;
 
     /**
      * Declare the view of this category.