Firebase Analytics Flutter Official Example doesn't work

[woohelps]

Describe the Problem
I have downloaded Flutter Example and modify it according to instruction,
but can't get any data in my firebase account Analytice Dashborad.

To Reproduce
Steps to reproduce the behaviour:

Go to

1. https://github.com/FirebaseExtended/flutterfire/tree/master/packages/firebase_analytics/firebase_analytics/example
   Clone repo for source codes
2. updated pubspec.yaml and replace google-services.json with my configure.
3. Do flutter pub get in the folder

Here is the code: https://github.com/woohelps/firebase_analytics_example

The example can be run without any error, but I can't get any data from this example.

Set up a device or emulator for running your app. Emulators must use an emulator image with Google Play.
I am using an emulator with Google Play to run this example.