Client of ASUS Download Master allows to manage Download Master USB application for ASUS routers. You can manage your torrent downloads and add new torrents: just download and open them on your Android device.
Confirmed compatibility with models RT-AC68U RT-N66U RT-AC66U RT-N55U RT-N56U DSL-N55 RT-N50U RT-N16 RT-N14 (list based on positive feedbacks in comments)
Open-source project. Codebase: http://code.google.com/p/asus-download-master-client/