Add GeoJsonLayer support to Compose map

**Is your feature request related to a problem? Please describe.**

In order to be able to use GeoJson, we need GeoJsonLayer support.

**Describe the solution you'd like**
A clear and concise description of what you want to happen.

A new Composable to add GeoJson shape.

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

Expose GoogleMap instance, so we can add GeoJsonLayer and update the map instance.