res/drawable/ic_stop.xml

<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="48dp"
        android:height="48dp"
        android:viewportWidth="48"
        android:viewportHeight="48">

    <path
            android:pathData="M0 0h48v48H0z" />
    <path
            android:fillColor="#000000"
            android:pathData="M12 12h24v24H12z" />
</vector>