The ic_menu_info icon is properly displayed in the xml menu item that calls it but not in this AlertDialog.
new AlertDialog.Builder(this).setMessage(menuInfo).setNeutralButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface d, int i) {
// do nothing – it will close on its own
}
})
.setIcon(R.drawable.ic_menu_info).show();
...