Ensure DashboardFragment shares pref controlls with search

Test: make RunSettingsRoboTests
Change-Id: I48be270d9706539925d00874bae29d46406ac491
Fix: 35812240

src/com/android/settings/deviceinfo/BuildNumberPreferenceController.java

@@ -67,7 +67,7 @@ public class BuildNumberPreferenceController extends PreferenceController
         super(context);
         mActivity = activity;
         mFragment = fragment;
-        mUm = UserManager.get(context);
+        mUm = (UserManager) context.getSystemService(Context.USER_SERVICE);
         mMetricsFeatureProvider = FeatureFactory.getFactory(context).getMetricsFeatureProvider();
         if (lifecycle != null) {
             lifecycle.addObserver(this);