confused when doing config app.gradle

[hawful70]

Hi everyone,
I'm newbie in nativescript. currently, I want to implement google analytics for my project.
When reading "Get Config files" section, the instructions guide me to access android configuration. right now I've got stuck in adding dependencies, the document in android mention about build.gradle but, like I know, we just add the dependencies in app.gradle.
is there anyone do successfully with this plugin, please guide me.
Thanks