Add FocusParkingView to KitchenSink app

FocusParkingView is required for rotary to work correctly.

Bug: 171839592
Test: manual
Change-Id: I30e8afab4fbda5766e68d8694e8246cd60f486a0
diff --git a/tests/EmbeddedKitchenSinkApp/res/layout/kitchen_activity.xml b/tests/EmbeddedKitchenSinkApp/res/layout/kitchen_activity.xml
index e6de221..56f3dc8 100644
--- a/tests/EmbeddedKitchenSinkApp/res/layout/kitchen_activity.xml
+++ b/tests/EmbeddedKitchenSinkApp/res/layout/kitchen_activity.xml
@@ -20,6 +20,15 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
+    <!-- When not in touch mode, if we clear focus in current window, Android will re-focus the
+         first focusable view in the window automatically. Adding a FocusParkingView to the window
+         can fix this issue, because it can take focus, and it is transparent and its default focus
+         highlight is disabled, so it's invisible to the user no matter whether it's focused or not.
+         -->
+    <com.android.car.ui.FocusParkingView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
+
     <Button
         android:id="@+id/menu_button"
         android:layout_width="wrap_content"