Adds to AltitudeConverter a method that returns a geoid height at the location...

Adds to AltitudeConverter a method that returns a geoid height at the location (go/msat:geoid-heights-altitude-hal-design).

Note that the implementation uses *fake* assets for calculating expiration distances, specifically, a copy of the geoid height assets. Real assets will be added in followup CLs.

Test: FrameworksMockingServicesTests:AltitudeConverterTest
Bug: 304375846
Change-Id: I78bc3c9f9d814f750c38c627ee9af8dc27183e2a