Deploy the artifact to local directory

deploy.gradle

publishing {
    publications {
        maven(MavenPublication) {
            groupId 'THE_GROUP_ID'
            artifactId project.name
            version android.defaultConfig.versionName
            artifact source: file("${project.buildDir}/outputs/aar/${project.name}-release.aar")
        }
    }
    repositories {
        maven {
            url "file:${rootDir}/maven-repo" //assign the release directory

        }
    }
}
// need to apply maven-publish and this file in build.gradle
// example:
// apply plugin: 'maven-publish'
// apply from: '../deploy.gradle'