Before setting up the Adobe Air SDK, you must generate the appropriate credentials for the platform(s) you are releasing on:
Android - Generate a Google Server API Key
There is currently no first-party Adobe Air SDK. You may use one of the following options to build your Adobe Air app:
Adobe Air support is available via an excellent 3rd party extension courtesy of Milkman Games for a one time fee of $39.99.
1. Purchase the Milkman Games EasyPush extension on this page.
2. Follow their instructions to add it to your app.
There is also a free and open source Adobe Air plugin for OneSignal available here.