I would urge you to not mention anything such an early stage in an interview process.
Even with companies that have diversity policies, individual recruiters can (and do) use any excuse to discard candidates that they think won't be a good fit for their team, or who they suspect might be troublesome in some way.
The smartest move is to wait until a later stage, preferably when you have a job offer in writing. At that point, you can contact Human Resources and explain your situation, and get all your records changed (and any uniform sorted) before you start your job. This is sensible because if you have a job offer in writing and a company then revokes it when you come out to them, you have grounds to sue for discrimination... but if you come out at a very early stage and they decide not to take you forward to the next stage, you have no way of proving why they made that decision.
Good luck with your interview!