Custom Preference Android Kotlin

I'd like to subclass Preference to create a custom preference item in Kotlin. I am unable to get the custom preference to inflate in the Preference screen. If I remove this custom preference from my preference screen, the rest of the preferences I have implemented (not shown here) are working fine. There are many similar seeming questions here, but none of the ones I've found directly deal with the issue of creating a Kotlin implementation of a custom preference.

Please help me with a working example that you've tested that shows three things:

1. custom_preference.xml
2. CustomPreference.kt
3. preference_screen.xml (Parent Preference screen to display custom preference)

Here is my code: A custom xml preference item that displays a string (let's keep it simple for the example, although my preference will end up having significantly more functionality)

custom_preference.xml

<Preference 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@android:id/widget_frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".CustomPreference">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="This is a custom preference" />
</Preference>

A class that extends Preference and includes the proper constructors.

CustomPreference.kt

package com.example.myApp

import android.content.Context
import android.support.v7.preference.Preference
import android.support.v7.preference.PreferenceViewHolder
import android.util.AttributeSet
import com.example.myApp.R
import com.example.myApp.R.layout.custom_preference

class CustomPreference (context: Context,
                            attrs: AttributeSet? = null,
                            defStyleAttr: Int = R.attr.preferenceStyle,
                            defStyleRes: Int = defStyleAttr)
    : Preference(context, attrs, defStyleAttr, defStyleRes) {
    override fun onBindViewHolder(holder: PreferenceViewHolder?) {
        super.onBindViewHolder(holder)
        layoutResource = custom_preference
    }
}

The custom preference declaration in the PreferenceScreen.

preference_screen.xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.preference.PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <com.example.CustomPreference
        app:key="custom_preference_key"
        app:title="This is a custom preference" />
</android.support.v7.preference.PreferenceScreen>

Note: I manually renamed class names here for the example. Also, I must use the support libs instead of Androidx for this project.

from Custom Preference Android Kotlin