After going through several documents on the Allseen website, I found outdated git hub links. There were download links to download sdks for android and linux. But is there a download available for the onboarding app for Android?
You might use the Dashboard Android app to onboard Alljoyn devices. Git clone the repo to get the sources:
git clone https://git.allseenalliance.org/gerrit/contributed_applications/dashboard.git
or download the apk from the CDN at: http://mirrors.kernel.org/allseenalliance/alljoyn/15.04/Dashboard_01_01_5.apk
Hope this helps