Update getGnssCapabilities() in LMS to include sub-HAL capabilities (part 2)

Implement the getGnssCapabilities() method in LocationManagerService
class to return the capabilities exposed through the GnssCapabilities
class. This part 2 is a follow up to CL ag/6776830.

Bug: 128913861
Test: Tested with cuttlefish and blueline device.
Change-Id: I766e8dc841b5f329d1773e5b37076ed99c55ebf6