I don't know when this feature was added, but if you go into the Mantano settings, there's specifically a setting for adding your ADE subscription info. I assume they're adding that so that they can validate you when you point to an acsm file.

Also I noted that ADE lists Mantano Reader (Android) specifically as being supported. It's in the list of supported devices on this page.

http://blogs.adobe.com/digitalpublis...ported-devices