chromium/components/cronet/android/sample/res/layout/options_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/options_recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>