Building and publishing an Android app is a little more straightforward than iOS because you just interface with the command line to build the .apk file and upload it to Google Play's Developer Console.
The Ionic Framework documentation also has a great instruction page for this, which is http://ionicframework.com/docs/guide/publishing.html.
The requirement is to have your Google Developer account ready and to log in to https://play.google.com/apps/publish.
Your local environment should also have the right SDK as well as
zipalign command line for that specific version.
Here are the instructions: