Use it like https://firebase.google.com/docs/reference/android/com/google/firebase/iid/FirebaseInstanceId
In the enabled device, it will search for the default FirebaseApp name that TotalCross uses and return
it's FirebaseInstanceId instance token. If in a device that is not enabled Firebase (be it lack of
configuration file or not yet binded with TotalCross), it will return null.
If you are going to deliver a unicast push message, you must retrieve the must recent token and use it.
Currently suported platforms: