The perks of Google's Nexus S used to lie solely in its unadorned OS. Now, owners of its penultimate Android flagship are about to get some additional mileage out of their Gingerbread-bearing handsets, courtesy of that underused NFC chip. The recently awakened near field communication feature's already been put to public task by Google Wallet and participating merchants, and will now add NJ Transit to its list of contactless payment partners. Select locations throughout the Garden State's transportation network, including Penn Station and Newark A