[Enhancement] Add lat_lng location support for GoogleMaps provider tool

[ilcato]

Feature Type

Would make my life easier

Feature Description

The GoogleMaps provider tool in the Google plugin currently doesn't support passing user location coordinates (lat_lng) for location-aware queries. According to Google's Grounding with Google Maps documentation, the retrieval_config.lat_lng parameter enables more accurate responses for proximity-based queries like "restaurants near me".

Workarounds / Alternatives

No response

Additional Context

This would enable developers to build location-aware voice assistants that can leverage Google Maps' 250+ million places database for personalized recommendations.