google-material-design-icons/android/navigation/fullscreen/materialicons/black/res/drawable/baseline_fullscreen_36.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="36dp"
    android:height="36dp"
    android:viewportWidth="36"
    android:viewportHeight="36"
    android:tint="?attr/colorControlNormal">
  <path
      android:fillColor="@android:color/white"
      android:pathData="M10,21L7,21v8h8v-3h-5v-5zM7,15h3v-5h5L15,7L7,7v8zM26,26h-5v3h8v-8h-3v5zM21,7v3h5v5h3L29,7h-8z"/>
</vector>