etesync-android/app/src/main/res/layout/activity_about.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright © 2013 – 2016 Ricki Hirner (bitfire web engineering).
  ~ All rights reserved. This program and the accompanying materials
  ~ are made available under the terms of the GNU Public License v3.0
  ~ which accompanies this distribution, and is available at
  ~ http://www.gnu.org/licenses/gpl.html
  -->

<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
                                                 xmlns:app="http://schemas.android.com/apk/res-auto"
                                                 android:orientation="vertical"
                                                 android:fitsSystemWindows="true"
                                                 android:layout_width="match_parent"
                                                 android:layout_height="match_parent">

    <com.google.android.material.appbar.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:theme="@style/ThemeOverlay.AppCompat.ActionBar">
        
        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"/>

        <com.google.android.material.tabs.TabLayout
            android:id="@+id/tabs"
            app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            style="@style/tablayout"
            app:tabMode="scrollable"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

    </com.google.android.material.appbar.AppBarLayout>

    <androidx.viewpager.widget.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

</androidx.coordinatorlayout.widget.CoordinatorLayout>