tests/FeatureSplit/feature1/res/layout/main.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">
    <include layout="@layout/included"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</FrameLayout>