Gradle dependency on Gluon Mobile

Hello everyone, I’m developing an application, android with gluon mobile, it uses gradle. So I added some firebase dependencies on it, but when I try to use the firebase classes, I can not instantiate them in my project. Am I doing something wrong?

Meu build.gradle:

    buildscript {
    repositories {
        jcenter()
//        mavenLocal()
//        maven { url 'https://maven.google.com'  }
    }
    dependencies {
        classpath 'org.javafxports:jfxmobile-plugin:1.3.10'
        classpath 'com.google.gms:google-services:3.1.0'
    }
}

apply plugin: 'org.javafxports.jfxmobile'

repositories {
	flatDir {
        dirs 'libs'
    }
    jcenter()
    maven { url 'http://nexus.gluonhq.com/nexus/content/repositories/releases'}
    maven { url 'https://maven.google.com'  }
    maven { url 'https://maven.fabric.io/public' }
}

mainClassName = 'com.gluonapplication.GluonApplication'

//apply plugin: 'com.android.application'
apply  plugin   :   'java' 
apply  plugin   :   'eclipse' 

allprojects {
    repositories {
        jcenter()
        mavenLocal()
        maven { url 'https://maven.google.com'  }
        maven { url 'https://maven.fabric.io/public' }
    }
}

dependencies {
    compile 'com.gluonhq:charm:4.4.1'
    compile fileTree (dir: 'com.google.firebase', include:['firebase-core:11.0.4.jar'])
    compile 'com.google.firebase:firebase-auth:11.8.0'
    compile 'com.google.android.gms:play-services-auth:11.8.0'
    
     compile 'com.google.firebase:firebase-database:11.8.0'
     compile 'com.firebaseui:firebase-ui-database:3.0.0'
}

jfxmobile {
    downConfig {
        version = '3.6.0'
        // Do not edit the line below. Use Gluon Mobile Settings in your project context menu instead
        plugins 'display', 'lifecycle', 'statusbar', 'storage'
    }
    android {
    	minSdkVersion '3'
        compileSdkVersion '27'
        targetSdkVersion '27'
        manifest = 'src/android/AndroidManifest.xml'
    }
    ios {
        infoPList = file('src/ios/Default-Info.plist')
        forceLinkClasses = [
                'com.gluonapplication.**.*',
                'com.gluonhq.**.*',
                'javax.annotations.**.*',
                'javax.inject.**.*',
                'javax.json.**.*',
                'org.glassfish.json.**.*'
        ]
    }
}

apply plugin: 'com.google.gms.google-services'

project.afterEvaluate {
    explodeAarDependencies(project.configurations.compile)
}