ultrasonic-app-subsonic-android/ultrasonic/src/main/res/drawable/media_stop_normal_light.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24">
  <path
      android:fillColor="#000"
      android:pathData="M6,6h12v12H6z"/>
</vector>