Covering fireplace in basement... need vapor barrier?

The basement of my bi-level was built finished. It's half below grade and half above grade. One entire wall is a white brick fireplace. I'm wanting to build a false wall to bother cover the wall and install a screen for a projector.

Do I need to install vapor barrier between the existing brick wall and the new false wall? I've not had any moisture problems with the existing drywall or carpet, but wasn't sure if brick was different.

Thanks,

Mike