Android:gradle I am unable to publish aar to local repository

Question

I am creating a library project in android studio. Android studio implicitly supports gradle build terminologies.

I want to publish library project to local maven repository so that I can use it in other projects. (I always have option to create library in same application but I also want to distribute this library)

I took help with this link With this link I am able to publish below three files

maven-metadata-remote.xml
maven-metadata-remote.xml.sha1
resolver-status.properties

I am still not able to publish aar file to local maven repo

1. Does this has any thing to do with application's build.gradle?
2. Am I missing to build aar file in library's build.gradle file? (though an aar file is getting built in outputs folder)

this is my library's build.gradle

apply plugin: 'com.android.library'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.loopj.android:android-async-http:1.4.9'
}

// added below code with the help of link
apply plugin: 'maven'

group = 'com.a.b'
version = '1.0'

uploadArchives {
    repositories {
        mavenDeployer {
            repository(url: "file://C:/Users/XXX User/.m2/")
        }
    }
}