[google_maps_flutter_web] Add missing MapOptions parameters

[sperochon]

Use case

On Flutter WEB, I would like to be able to enable/disable (via GoogleMap constructor params or whatever) those MapOptions parameters:
mapTypeControl
fullscreenControl
streetViewControl

that display additional buttons onto the Map.

Proposal

In the code of the package it is written (more than 15 months ago):

  // These don't have any rawOptions entry, but they seem to be off in the native maps.
  options.mapTypeControl = false;
  options.fullscreenControl = false;
  options.streetViewControl = false;

I have switched them all to "true" and it is working fine (= enables all the buttons and gives the previous screenshot). I tried each button and everything is working fine. So, it seems that the comment in the code is not true anymore.

Thanks!

[stuartmorgan]

If anyone is interested in addressing this, there was a work-in-progress PR at flutter/packages#4553 that could be used as a starting point.