MpnDevice class

Class representing a device that supports Mobile Push Notifications (MPN).

It contains device details and the listener needed to monitor its status.
An MPN device is created from the application context, the sender ID (a.k.a. authorized entity) and a device token (a.k.a. registration token) obtained from Firebase Cloud Messaging APIs, and must be registered on the LightstreamerClient in order to successfully subscribe an MPN subscription. See MpnSubscription.
After creation, an MpnDevice object is in "unknown" state. It must then be passed to the Lightstreamer Server with the LightstreamerClient.registerForMpn method, which enables the client to subscribe MPN subscriptions and sends the device details to the server's MPN Module, where it is assigned a permanent device ID and its state is switched to "registered".
Upon registration on the server, active MPN subscriptions of the device are received and exposed with the LightstreamerClient.getMpnSubscriptions method.
An MpnDevice's state may become "suspended" if errors occur during push notification delivery. In this case MPN subscriptions stop sending notifications and the device state is reset to "registered" at the first subsequent registration.