title: Firebase push notifications are not vibrating the phone
body: <p>My notification channel:</p>
  
  <pre><code>    CharSequence name = mApplication.getString(R.string.notification_messages_channel);
      String description = mApplication.getString(R.string.notification_messages_channel_description);
      int importance = NotificationManager.IMPORTANCE_HIGH;
      NotificationChannel channel = new NotificationChannel(CHANNEL_MESSAGES, name, importance);
      channel.setDescription(description);
      channel.enableVibration(true);
      channel.enableLights(true);
      channel.setVibrationPattern(new long[]{500,100,500});
      NotificationManager notificationManager = mApplication.getSystemService(NotificationManager.class);
      notificationManager.createNotificationChannel(channel);
  </code></pre>
  
  <p>And this is my payload:</p>
  
  <pre><code>var message = {
      data: {
          user: "asdasd",
          body: "adsadasd",
          sentto: "asdasd",
          gcm_username: "asdda"
      },
      android: {
          priority: 'high',
          notification: {
              title: 'Yeni mesaj aldınız',
              body: 'size bir mesaj gönderdi',
              tag: "asd223",
              sound: 'default'
          }
      },
      token: deviceToken
  };
  </code></pre>
  
  <p>When a notification arrives to the phone, it plays the notification sound but not vibrating. Where is the problem?</p>