Is This A Correct And Efficient Way To Implement Firebase Analytics?

I went through the documentation and some tutorials, but I still don't feel confident that I understand what parts of the code are necessary and what are just an example. Because t

Solution 1:

In order to test your analytics if it went up to the server or not, it does not take a few days. All you need to do is to make your app go to the background and back to the foreground and it should sync with the server.

You can log events with whatever info you want, there's no need for specific fields to be present