Fix: iOS NativeEventEmission

What's the Issue? Addressing the issues reported in Issues: #8 and #22, '<EmittedEvent> is not a supported event type in MqttModule' Why the Change is Needed Example project would throw fatal error on initialization. What Was Changed? Updated NativeEventEmitter listeners in javascript to accept pre-specified event types and removed dynamic naming based on clientId and eventId. Updated native module code in compliance with updated event types and included clientID/eventID in event body. Updated Android event emission in accordance and in doing so migrated from the deprecated deviceEmitter to the now standard NativeEventEmitter. Testing Before fix: - checkout main - run yarn example start & yarn example ios - Project will build but immediately encounter fatal error. After Fix: Repeat above steps with PR branch