remove p2p related things (Andromadus)

Sources:
https://github.com/Andromadus/android_device_htc_vision/commit/9db61b3273a6833402cdebe4620deab87287af21
https://github.com/Andromadus/android_device_htc_vision/commit/2eb38a1c5c94abc0b1498a1f6e7f96737facb9f3

Change-Id: If655674e01fe15e70f5806ebfe8cd8d741fa8799
Fixes after remove p2p related things (Andromadus)

The wifi_p2p in overlay can be removed.
Copy the wpa_supplicant and dhcpcd services from Tuna.
bnep0 is for bluetooth tethering.