NLP Combo feature

If Combo Provider is listening for network
locations, it will want to screen these locations
before they are sent out to clients.

Get the package name for combo provider from resouce
instead of hardcoding the name. Also, geofence services
provider is renamed to differentiate from the hal
geofence provider

Only screen network locations if Combo provider is
the connected network location provider.

Resolved issue where MockProvider was being cast to
LocationProviderProxy and would cause a fatal exception

CRs-fixed: 483398, 608477, 619882

Change-Id: I3156e85307b40aee9fb06b433c83153c84b8ed42