I think in the long term there will be some specific tablet apps for ship information and control but in the mean time I came across a customisable controller app.
https://play.google.com/store/apps/details?id=com.remotecontrolandroid
It was a brief search and so far it's the best I've found. (I've not tried it yet.)
If you know of a better app let me know :)
Oldbloke posted about this in another thread (CS:GO thread somewhere). - https://forums.robertsspaceindustries.com/discussion/117540/
Looks pretty good to me.