Notifications with android firebase

Good morning I have a problem. I would like you to help me as I am implementing push notifications with firebase in android the notification has the title body and an image I send from < strong> php my code is as follows:

function.php

        function enviarNotificacion($result, $msj, $title, $photo)
        {

            $registrationIds = [0];
            $x = 0;
            while($r = mysqli_fetch_object($result))
            {
                $registrationIds[$x] = $r->token;
            print("                /               ");
            print $r->token;
                $x++;
            }

            // prep the bundle
    //        $msg = [
      //          'title'         =>  $title,
        //        'body'          =>  $msj,
          //      'sound'         => 'default',
            //    'vibrate'       =>'1'
    $msg = array ("body" => $msj , "title" => $title, "sound" => 'default',"vibrate" =>'1');
            //];
    $dat = [
         'imagen' => $photo
    ];
            $fields = [
                'registration_ids'  => $registrationIds,
                'notification'              => $msg,
                'data'    => $dat
            ];
     $headers = [
                'Authorization: key=' . API_ACCESS_KEY,
                'Content-Type: application/json'
            ];
            $fields = json_encode( $fields );

            //apt-get install -y php5-curl

            $ch = curl_init();
            curl_setopt( $ch,CURLOPT_URL, 'https://fcm.googleapis.com/fcm/send' );
            curl_setopt( $ch,CURLOPT_POST, true );
            curl_setopt( $ch,CURLOPT_HTTPHEADER, $headers );
            curl_setopt( $ch,CURLOPT_RETURNTRANSFER, true );
            curl_setopt( $ch,CURLOPT_SSL_VERIFYPEER, false );
            curl_setopt( $ch,CURLOPT_POSTFIELDS, $fields );
            $result = curl_exec($ch );
            curl_close( $ch );
            session_start();
            exitosamente";

            return $result;
        }

class in java:

notification.java

    public class NoticiasFirebaseMessaginService extends FirebaseMessagingService 
    {
     private static final String TAG = "NoticiasMessaginService";
        private   Bitmap image ;
         public  String img ;

        @Override
        public void onMessageReceived(RemoteMessage remoteMessage) {
            super.onMessageReceived(remoteMessage);
            Log.d(TAG, "from "+ remoteMessage.getFrom());
            Noticia noticia = new Noticia();
            noticia.setTipo(remoteMessage.getNotification().getTitle());
            noticia.setDescripcion(remoteMessage.getNotification().getBody());
            //noticia.setPhoto(remoteMessage.getNotification().getIcon());
            img = remoteMessage.getData().get("imagen");
            showNotification(noticia);

        }

        public void showNotification(Noticia noticia)
        {
            Intent intent = new Intent(this, PrincipalActivity.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            PendingIntent pendingIntent
                    = PendingIntent.getActivity( this,0 ,intent,PendingIntent.FLAG_ONE_SHOT);
            Uri defaultSoundUri  = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

            try {
                image = Picasso.with(this).load(img).get();
                Log.i(TAG,"el el try");
            } catch (IOException e) {

                Log.i(TAG,"el el catch");
                e.printStackTrace();
            }

           NotificationCompat.Builder  notificationBuilder= new NotificationCompat.Builder(this)
                    .setSmallIcon(R.drawable.logo_sin_fondo)
                    .setLargeIcon(BitmapFactory.decodeResource(getResources(),R.drawable.useragricultor))
                    .setContentTitle(noticia.getTipo())
                    .setContentText(noticia.getDescripcion())
                    .setStyle(new  NotificationCompat.BigPictureStyle().bigPicture(image).setSummaryText(noticia.getDescripcion()))
                    .setAutoCancel(true)
                    .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
                    .setSound(defaultSoundUri)
                    .setVibrate(new long[]{0,300,200,300})
                    .setContentIntent(pendingIntent);
                     NotificationManager notificationManager
                    = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            notificationManager.notify(0,notificationBuilder.build());

        }

    }

When the app is open the notification comes to me in the following way:

But if the app is closed only something like this arrives:

I do not know where the error is or what needs to be done so that the notification comes from being closed the app in the same way as when it is open thanks to those who can help me, it would be very useful.
Thank you.