activity_main layout for DiffUtils test app

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:orientation="vertical"
        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
        app:layout_constraintBottom_toTopOf="@id/addButton"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:itemCount="10"
        tools:listitem="@android:layout/simple_list_item_1" />

    <com.google.android.material.button.MaterialButton
        android:id="@+id/addButton"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/horizontal_safe_area"
        android:layout_marginEnd="@dimen/spacing_4"
        android:layout_marginBottom="@dimen/spacing_20"
        android:paddingVertical="@dimen/spacing_12"
        android:text="@string/add"
        app:cornerRadius="@dimen/radius_24"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@id/removeButton"
        app:layout_constraintStart_toStartOf="parent" />

    <com.google.android.material.button.MaterialButton
        android:id="@+id/removeButton"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/spacing_4"
        android:layout_marginEnd="@dimen/horizontal_safe_area"
        android:layout_marginBottom="@dimen/spacing_20"
        android:paddingVertical="@dimen/spacing_12"
        android:text="@string/remove"
        app:cornerRadius="@dimen/radius_24"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@id/addButton" />

</androidx.constraintlayout.widget.ConstraintLayout>