app/src/main/res/layout/preference_markdown_text.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ https://android.googlesource.com/platform/frameworks/support/+/refs/heads/androidx-appcompat-release/preference/preference/res/layout/preference.xml
  -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:orientation="vertical">

    <TextView android:id="@android:id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:singleLine="true"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="?android:attr/textColorPrimary" />

    <include android:id="@android:id/summary" layout="@layout/markdown_adapter_node_default" />

</LinearLayout>