servicemanager: Allow tegra audio to register as a service

Change-Id: I6c792b6f5f586cf40d4a9b834e793a68c1e458a7
Wifi: Allow configuration of the P2P ifname

ICS used the same wifi.interface as the regular wifi service.
Let's use wifi.p2pinterface here, since they _can_ be different

Change-Id: Iab68b245b33377271354c849bbe33725a26193f1