Gradle file for Unity

I saw mentioned in another post that from the newest versions of Unity you can define your own gradle file. I need this in order to include support libraries and compat libraries.

I created a file called dfwvr.gradle in the Plugins/Android directory but it doesn't seem to help. Renaming it to build.gradle made no difference. I took the basic one from the one supplied.

 buildscript {
  repositories {
     jcenter()
  }

  dependencies {
     classpath 'com.android.tools.build:gradle:2.1.0'
  }
 }

  allprojects {
  repositories {
     flatDir {
       dirs 'libs'
     }
  }
 }

 apply plugin: 'com.android.application'

 dependencies {
  compile fileTree(dir: 'libs', include: ['*.jar'])
  compile "com.android.support:appcompat-v7:24.2.1"
  compile "com.android.support:support-v4:24.2.1"

 **DEPS**}

   android {
    compileSdkVersion **APIVERSION**
    buildToolsVersion '**BUILDTOOLS**'

 defaultConfig {
     targetSdkVersion **TARGETSDKVERSION**
 }

 lintOptions {
     abortOnError false
 }
 **SIGN**
 buildTypes {
     debug {
         jniDebuggable true
     }
     release {
         minifyEnabled false
         proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'
         **SIGNCONFIG**
     }
 }

  }

I followed what it says here but it doesn't work: http://answers.unity3d.com/questions/1308071/use-android-plugin-with-android-support-library-de.html

@liortal