Show stop button in a pressed state when pressed.

Fix for http://b/issue?id=2533372

Change-Id: I9a614a95f5537d17c9cb89e96afe6c21fc56d59a
diff --git a/res/layout/title_bar.xml b/res/layout/title_bar.xml
index 3765024..c251250 100644
--- a/res/layout/title_bar.xml
+++ b/res/layout/title_bar.xml
@@ -73,7 +73,7 @@
                 />
         </LinearLayout>
         <ImageView android:id="@+id/stop"
-            android:background="@*android:drawable/btn_search_dialog"
+            android:background="@drawable/stop_background"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:src="@drawable/ic_btn_stop_v2"