Dynamically update title and snippet of a marker

[tobrun]

With 4.0.0 we introduced a way to dynamically update a position and an icon of a Marker.
Currently we can't update the tittle or snippet yet.

A use-case from the testapp: Dynamic Marker. In this Activity you can change a marker location/icon from Chelsea to Arsenal. Now I wanted to add an InfoWindow with the names of the stadium. This currently not possible because we can't update the title/snippet dynamically.

[tobrun]

Adding a note here that this will also require updating the InfoWindow to a correct position and leave it open while doing so.

[tobrun]

Follow up issue in #5237, closing