Remove WifiStateTracker code tracking wifi p2p

This code was never supposed to have been there. It just remained
from an old implementation and actually results in
CS getting the wrong network info when both wifi and p2p are connected

Exposing p2p network type to CS needs to be done differently.

Bug: 7233984
Change-Id: I84a6091b8236cf5bdfcef3e7f626163d629e372d