Update PCO handling code such that it conforms to the latest VZW network
behavior. This includes updating the way we mark a SIM as provisioned.
In the old network, only provisioned SIMs can attach to the network.
Now, unprovisioned SIMs can attach and connect to the network.
Change-Id: Ie454f6fb6d8764161f167e93a4235bb93fbde59a
0b975f2266