Impossible to use free-draw-polygons in touch device


## Version
2.4.1

## Test Case
https://plnkr.co/edit/q2luS1vMdCAEVig8zEe5?p=preview

https://embed.plnkr.co/q2luS1vMdCAEVig8zEe5/

## Steps to reproduce
Use responsive mode, or a mobile device.

## Expected Behavior
We should be able to draw polygons like with the mouse's events

## Actual Behavior
We can't draw actualy

Maybe it could from the last update of Google Maps
