Add indicator item for enabling USB tethering.
One can enable USB tethering on devices that have rndis support enabled in the kernel:
gdbus call --system --dest com.meego.usb_moded --object-path /com/meego/usb_moded --method com.meego.usb_moded.set_mode rndis_adb
We should provide an indicator item in the network indicator to make this feature available through UI.