Add support for building and boundary calculations in geocoding response

[asif-mahmud]

Is your feature request related to a problem? Please describe.
Geocoding APIs now experimentally support extra computations which yields buildings and entrances, but the library doesn't provide them in response typing.

Describe the solution you'd like
Add new types in geocoding result.

Describe alternatives you've considered
The parameter extra_computations has to be added in request by Custom property now, thought about adding them by some flags like EnableBuildingAndEntrances. But still have to add the types in response.

Additional context
Doc links -

• https://developers.google.com/maps/documentation/geocoding/building-attributes
• https://developers.google.com/maps/documentation/geocoding/requests-geocoding