tests/notification/res/layout/full_screen.xml

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:src="@drawable/page_hed"
        android:onClick="dismiss"
        />
</FrameLayout>