Here is some earlier work by Tim Newsham using a styx library by Charles/Vita Nuova:

https://github.com/9nut/styxbrowser


Android-related:

(a) An Android "app" that presents an Android phone's telephone and SMS
    messaging facilities as a 9P filesystem.  This would enable Plan 9
    and Inferno applications to place/receive voice calls and
    send/receive text messages across a network.  This could be done by
    extending bhgv's existing Android port of Inferno, or as a
    separtate, stand-alone server app.