Exposing a parameter to set `contentDescription` on the Clustering

[kikoso]

To set a parameter like contentDescription on the Maps, this could be done via the marker setTitle function. On Android Maps Utils this can be set on a few places, like onClusterItemUpdated on the Renderer. However, this cannot be used from the Compose library directly.

We could think of a parameter exposed via Renderer (or manager?) called contentDescription that would be manually used to set the marker title on the Renderer, hence providing accessibility support.