build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
       // classpath 'com.android.tools.build:gradle:4.1.0-rc03'
        classpath 'com.google.gms:google-services:4.3.3'


//        classpath 'com.android.tools.build:gradle:4.0.1-alpha04'
       classpath "com.android.tools.build:gradle:4.0.0"
//        classpath 'com.android.tools.build:gradle:4.1.0-alpha04'
//          classpath "com.android.tools.build:gradle:4.0.0"


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}