Better reverse geocoding

[justinklchan]

Right now we are using the Geocoder API for Android to convert from GPS coordinates to real addresses. The Geocoder API isn't that great for resolving to real addresses.

It would be better to be able to use a cloud service like this for address resolution:
https://developers.google.com/maps/documentation/geocoding/usage-and-billing

The barrier of course is pricing.

However, given that there is a real potential for adoption, individual states could potentially be able to fund cloud services like this.

The ask in this issue is to be able to add in the feature for development testing and have a flag to turn it on or off.

So if we decide we want it, we can turn it on, and add in the appropriate API key.

And if we decide a particular deployment doesn't need it. Then we can leave it off.

The developers for this can share the API key privately for testing.