ic_transport_stop.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  Stop icon. Filled square.
-->
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24"
    android:tint="@android:color/white">
    <path
        android:fillColor="#FFFFFFFF"
        android:pathData="M6,6h12v12H6z"/>
</vector>