It’s not a priority right now, and I can’t honestly imagine it will be any time soon. Android Pay works with Samsung phones, obviously, so by building Android Pay support we can offer a NFC payment option to all of our Android users. Therefore it’s not as if Samsung users wouldn’t be able to use NFC payments. Meaning the only devices left out in the cold would be Samsung wearables, of which the market share is incredibly small.
If it’s only a small amount of work to implement it (as in, a few hours max) then it’s possible one of our Android devs might be able to spend some time on it at some point, but we simply don’t have the resources right now, nor probably any time soon, given the amount of users that would actually benefit from it.