sepolicy : Removed netadmin capability for location

Removed net admin capabilites for lowi. From now nl msgs of lowi
would route to wifihal via control socket.
Wifi hal allows its authenticated clients to send nl msgs to it.
Lowi module is one of its clients and hence added socket permissions
to access wifihal control interface

CRs-Fixed: 2424268
Change-Id: I18aba9169b23e8b0c9260cbf1e7a52bf59e0030d