res/layout/more_settings_button.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2021 The Android Open Source Project
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~      http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->
<FrameLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:settings="http://schemas.android.com/apk/res-auto"
      android:layout_width="match_parent"
      android:layout_height="wrap_content">

      <Button
         android:id="@+id/button"
         style="@style/ActionPrimaryButton"
         android:theme="@style/RoundedCornerThemeOverlay"
         android:paddingHorizontal="16dp"
         android:drawablePadding="8dp"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginVertical="8dp"
         android:layout_marginHorizontal="16dp"
         settings:allowDividerBelow="true"/>

</FrameLayout>