Can't show notification on system tray after restart device. (FCM)

### Step 1: Are you in the right place?

Yes, I'm running the message project. (FCM)

### Step 2: Describe your environment

* Android device: Sumsang Note 8
* Android OS version: 8.0
* Google Play Services version: 14.7.99
* Firebase/Play Services SDK version: 17.3.4

### Step 3: Describe the problem:
When app is in foreground or in background (is running), works well. but once stoped by system or restart the device, can't receive notification to show on the system tray.

#### Steps to reproduce:

1. Install the message app (quickstart-android/message) on device; and open it
2. Push notification from Firebase console; works.
3. put the app to the background
4. push notification from Firebase console again, also works
5. Restart device
6. push notification from Firebase console, can NOT show notification on system tray.

#### Observed Results:

Nothing can be see on logcat

#### Expected Results:

When restart device, the notification should show on System tray, just like running in background.

#### Relevant Code:

has no extra code.

#### add result,
Run the following command,
`adb shell dumpsys com.ginko.ginko | grep stopped`

get lots of output like,
.....
User 0: ceDataInode=0 installed=true hidden=false suspended=false stopped=false notLaunched=false enabled=0 instant=false
User 150: ceDataInode=0 installed=true hidden=false suspended=false stopped=false notLaunched=false enabled=0 instant=false
....