4.0 ice cream sandwich - Is it possible to use android phone as bluetooth headset for ps3?

Does anyone know how to use the android phone as a bluetooth headset so that i can use it as a mic while playing several games (COD) for example.

I'm using Ice Cream Sandwich and i have a Galaxy Vibrant. I don't want to buy a bluetooth headset so i'm simply looking to use my phone as an intermediate adapter. I can connect my wired headphones which has a mic attached to it.