Signal-Android/app/src/main/res/layout/indeterminate_loading_circle_pref.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:viewBindingIgnore="true"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingTop="16dp"
    android:paddingBottom="16dp">

    <ProgressBar
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:indeterminate="true" />

</FrameLayout>