Notification not fired

[mudiadamz]

This plugin is work, but i still need to add some line at root-level build.gradle to make it really work, based on this google guide: https://firebase.google.com/docs/cloud-messaging/android/first-message

buildscript {
    // ...
    dependencies {
        // ...
        classpath 'com.google.gms:google-services:4.2.0' // google-services plugin
    }
}

allprojects {
    // ...
    repositories {
        // ...
        google() // Google's Maven repository
    }
}