Signal-Android/app/src/main/res/layout/conversation_settings_internal_preference.xml

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

    <com.google.android.material.button.MaterialButton
        android:id="@+id/internal_details"
        style="@style/Signal.Widget.Button.Small.Primary"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="4dp"
        android:text="@string/preferences__internal_details" />

</FrameLayout>