build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        google()
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.google.guava:guava:24.1-jre'
        classpath 'com.android.tools.build:gradle:3.3.2'
        classpath 'com.jakewharton:butterknife-gradle-plugin:10.1.0'
        // 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
}

// still tring to do this suggestion
/*class copyDependencies extends DefaultTask {
    @TaskAction
    void doAction(){
        ":backend:appengineStart"
    }

}

task doIt (type: copyDependencies)*/