Here is an excerpt from Encyclopedia Halachit Refuit from Dr. Avraham Steinberg.
Translation (my own): A women who underwent surgery to appear like a man, even if they formed for her a male limb, there is no obligation to do a bris on this limb, even if it is formed from her natural clitoris.
In regards to a non-jewish woman that underwent gender reassignment surgery to become a man, it is not appropriate to accept them as a convert.
It appears that there is also no need to do hatafas dam bris, otherwise he would have mentioned it.