decouple SW FLP and HW FLP overlay flags

currently there is only overlay flag shared by SW FLP and HW FLP. This
change allows having different overlay setting for sw / hw FLPs.

Change-Id: I643fa70380e7568ae851d23e87917a5b4b599fe8
CRs-Fixed: 622338
Combo Provider: Get the package name from resource

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

CRs-fixed: 608477

Change-Id: I84739e440d688d6e1784aa5ab4e2074eaa740bab
Combo Provider: Specific location screening

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

CRs-fixed: 608477

Change-Id: I513bddae9cff493dd9aac4460168864548e4bfb4
Fix for crash in LocationManagerService

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

Change-Id: I7c8c83961dd03d59292e773b01995ed6b3ac04c7
CRs-fixed: 619882