Implement phone search in DialtactsActivity

Includes tiny layout fixes for ContactSelectionActivity,
which also uses the same phone search fragment.

TODO: let the other Adapters like DefaultContactPickerFragment,
      EmailAddressPickerFragment support grouping feature.

Change-Id: I8d7718192522a0005b9b76931560fe297cad882f
diff --git a/res/layout/dialtacts_activity.xml b/res/layout/dialtacts_activity.xml
index 7a9e7b2..675dcdb 100644
--- a/res/layout/dialtacts_activity.xml
+++ b/res/layout/dialtacts_activity.xml
@@ -45,4 +45,12 @@
         class="com.android.contacts.list.StrequentContactListFragment"
         android:layout_height="match_parent"
         android:layout_width="match_parent" />
-</FrameLayout>
\ No newline at end of file
+
+    <!-- For phone search UI -->
+    <fragment
+        android:id="@+id/phone_number_picker_fragment"
+        class="com.android.contacts.list.PhoneNumberPickerFragment"
+        android:layout_height="match_parent"
+        android:layout_width="match_parent" />
+
+</FrameLayout>