I'd guess that it depends on the reason the person seems unempathetic.
If they're an "Oh well, it's crap but that's life and you just get on with it without making a fuss don't you" kind of a person, and they apply that thinking to themselves as well as to everyone else, then they probably wouldn't expect empathy, though they might appreciate it.
If they don't like being treated the way people often act when they're trying to demonstrate empathy (maybe they get annoyed by unwanted expressions of concern and sympathy, or feel like offers of help are implying they're incapable, or whatever), then they might act as though they're unempathetic because they're treating others the way they'd like to be treated.
If they act unempathetic because they genuinely can't interpret and don't understand your emotions, but would want to help you if someone explicitly told them, that probably doesn't have much bearing on whether they'd want your empathy.
If they don't care about you and don't want to put themselves out for you because they feel you're less important than them, then I suppose the corollary of that is that they'd expect you to go all-out on caring for them at the drop of a hat.
There's probably lots of reasons someone might not seem empathetic to you, and lots of ways that might or might not correlate with the level or type of empathetic behaviour they'd expect or want from others