res/drawable/ic_app_icon.xml

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24">

    <path
        android:pathData="M0 0h24v24H0z" />
    <path
        android:fillColor="#000000"
        android:pathData="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 17.93c-3.95-0.49-7-3.85-7-7.93 0-0.62 0.08 -1.21 0.21 -1.79L9 15v1c0 1.1 0.9 2 2 2v1.93zm6.9-2.54c-0.26-0.81-1-1.39-1.9-1.39h-1v-3c0-0.55-0.45-1-1-1H8v-2h2c0.55 0 1-0.45 1-1V7h2c1.1 0 2-0.9 2-2v-0.41c2.93 1.19 5 4.06 5 7.41 0 2.08-0.8 3.97-2.1 5.39z" />
</vector>