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

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

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

        <TextView
            android:id="@+id/primary_text"
            style="@style/Widget.Leanback.DetailsDescriptionTitleStyle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="3dp"
            android:layout_marginTop="15dp"
            android:fontFamily="sans-serif-light"
            tools:text="Title Text" />


        <TextView
            android:id="@+id/extra_text"
            style="@style/Widget.Leanback.DetailsDescriptionBodyStyle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fontFamily="sans-serif-regular"
            android:text="" />
    </LinearLayout>
</ScrollView>