Add a DashboardContainerFragment to host DashboardSummary.

Eventually the container fragment will host more dashboard-type
fragments. For now it's just DashboardSummary.

Change-Id: I217ad71c2f2bbc4b7247c9dd2c3c2b8c8660d945

src/com/android/settings/InstrumentedFragment.java

@@ -16,11 +16,11 @@
 
 package com.android.settings;
 
-import com.android.internal.logging.MetricsLogger;
-
 import android.os.Bundle;
 import android.support.v14.preference.PreferenceFragment;
 
+import com.android.internal.logging.MetricsLogger;
+
 /**
  * Instrumented fragment that logs visibility state.
  */
@@ -28,6 +28,8 @@ public abstract class InstrumentedFragment extends PreferenceFragment {
     // Declare new temporary categories here, starting after this value.
     public static final int UNDECLARED = 100000;
 
+    public static final int DASHBOARD_CONTAINER = UNDECLARED + 1;
+
     /**
      * Declare the view of this category.
      *