ring-android/app/src/main/res/layout/activity_wizard.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/color_primary_dark"
    android:orientation="vertical">

    <FrameLayout
        android:id="@+id/wizard_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>