res/drawable/ic_launcher_background.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
     SPDX-FileCopyrightText: 2022 The LineageOS Project
     SPDX-License-Identifier: Apache-2.0
-->
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="108dp"
    android:height="108dp"
    android:viewportWidth="108"
    android:viewportHeight="108">

    <path
        android:pathData="M0,0h108v108h-108z"
        android:fillColor="#ffffff" />
</vector>