Frame drop when scrolling map by calling [projection pointForCoordinate:] in didChangeCameraPosition: delegate method

#### Environment details

1. GoogleMaps 6.0.1
2. Xcode 13.1 & iPhone 12(iOS 15.0)

#### Code example

```
- (void)mapView:(GMSMapView *)mapView didChangeCameraPosition:(GMSCameraPosition *)position {
    // add this line then frame drop when scrolling
    [mapView.projection pointForCoordinate:position.target]; 
}
```

Thanks!
