I receive only last one message when turn on internet?

send with notification payload for background notification.
but if send without "notification" payload i receive notification is normal when send while device off internet and then device turn on internet.
https://fcm.googleapis.com/fcm/send
```json
{
"to":"....",
"data":{
"destination":"1",
"source":"2",
"badge":"1"},
"notification":{
"title":"Hello7","body":"Hello Test"
},
"priority":"high"
}
```

### Step 1: Describe your environment

* Android device: test on Pixel 2xl,Oneplus6,Oppo F7
* Android OS version: Android 10,9,8
* Google Play Services version: Last
* Firebase/Play Services SDK version: Last

### Step 2: Describe the problem:

#### Steps to reproduce:

1. Turn off internet
2. send fcm message 10
3. Turn on internet
4. Receive only last one message and 9 message not receive
Note**: but when send notification while device online notification receive normal

#### Observed Results:

2019-12-03 14:03:47.765 4931-4931/? V/FA-SVC: NetworkBroadcastReceiver received action: android.net.conn.CONNECTIVITY_CHANGE
2019-12-03 14:03:47.801 4931-15302/? V/FA-SVC: Unregistering connectivity change receiver
2019-12-03 14:03:47.802 4931-15302/? V/FA-SVC: Upload scheduled in approximately ms: 3047916
2019-12-03 14:03:47.802 4931-15302/? V/FA-SVC: Cancelling job. JobID: 812057698
2019-12-03 14:03:47.811 4931-15302/? V/FA-SVC: Scheduling upload with GcmTaskService
2019-12-03 14:03:47.811 4931-15302/? V/FA-SVC: Scheduling task with Gcm. time: 3047916
2019-12-03 14:03:48.216 10173-15301/com.tss.testfcmraw D/FA: Logging event (FE): notification_receive(_nr), Bundle[{ga_event_origin(_o)=fcm, message_type(_nmc)=display}]
2019-12-03 14:03:48.309 10173-15301/com.tss.testfcmraw V/FA: Connecting to remote service
2019-12-03 14:03:48.330 10173-15301/com.tss.testfcmraw D/FA: Connected to remote service
2019-12-03 14:03:48.333 10173-15301/com.tss.testfcmraw V/FA: Processing queued up service tasks: 1
2019-12-03 14:03:48.367 4931-15302/? V/FA-SVC: Logging event: origin=fcm,name=notification_receive(_nr),params=Bundle[{ga_event_origin(_o)=fcm, message_type(_nmc)=display}]
2019-12-03 14:03:48.395 4931-15302/? V/FA-SVC: Saving event, name, data size: notification_receive(_nr), 35
2019-12-03 14:03:48.396 4931-15302/? V/FA-SVC: Event recorded: Event{appId='com.tss.testfcmraw', name='notification_receive(_nr)', params=Bundle[{ga_event_origin(_o)=fcm, message_type(_nmc)=display}]}
2019-12-03 14:03:48.398 4931-15302/? V/FA-SVC: Upload scheduled in approximately ms: 3047320
2019-12-03 14:03:48.399 4931-15302/? V/FA-SVC: Cancelling job. JobID: 812057698
2019-12-03 14:03:48.402 4931-15302/? V/FA-SVC: Scheduling upload with GcmTaskService
2019-12-03 14:03:48.402 4931-15302/? V/FA-SVC: Scheduling task with Gcm. time: 3047320
2019-12-03 14:03:48.407 4931-15302/? V/FA-SVC: Background event processing time, ms: 41
2019-12-03 14:03:53.373 10173-15301/com.tss.testfcmraw V/FA: Inactivity, disconnecting from the service

#### Expected Results:

When turn on internet i want to get 10 notification.

#### Relevant Code:

```
// TODO(you): code here to reproduce the problem
```

Không cung cấp tệp repository, bài kiểm thử hoặc mã ứng dụng có thể tái hiện. Hãy bắt đầu bằng việc xem lại hướng dẫn về thông báo chạy nền của FCM trong các issue #4 và #89, sau đó tái hiện payload đã nêu và chuỗi ngoại tuyến trên các phiên bản Android được liệt kê. Được xem là hoàn tất khi xác định được hành vi đó có nằm trong dự kiến hay không và xác định được một thay đổi cụ thể đối với repository hoặc một cập nhật tài liệu.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.