Please see the Quick Start guide here:
The following tools are required to build the TUNE ANE:
Adobe AIR
Adobe Flex SDK
http://www.adobe.com/devnet/flex/flex-sdk-download.html
Android SDK
http://developer.android.com/sdk/index.html
Google Play Services
https://developers.google.com/android/guides/setup
In the /build/ folder, rename the build.config.dist file to build.config and set your system paths for flex.sdk and android.sdk.
In extension.xml, platformandroid.xml, and platformios.xml, change the AIR SDK version if needed.
Then from /build/, run 'ant' which will create a TuneANE.ane file in the /dist/ folder.