res/layout/preference_widget_add_progressbar.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2022 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
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  -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:id="@+id/add_clone_layout">
    <ImageView
        android:id="@+id/add_preference_widget"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_gravity="center"
        android:minWidth="@dimen/two_target_min_width"
        android:paddingStart="?android:attr/listPreferredItemPaddingEnd"
        android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
        android:background="@drawable/ic_add_24dp"
        android:scaleType="center"
        android:tint="?android:attr/colorAccent"
        android:contentDescription="@string/add" />

    <ProgressBar
        android:id="@+id/progressBar_cyclic"
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:visibility="gone"/>
</RelativeLayout>