Called when a marker has been clicked or tapped.
Note: the first thing that happens when a marker is clicked or tapped is that any
currently showing info window is closed, and the GoogleMap.OnInfoWindowCloseListener is
triggered. Then the OnMarkerClickListener is triggered. Therefore, calling isInfoWindowShown() on any marker from the OnMarkerClickListener will return
The marker that was clicked.
true if the listener has consumed the event (i.e., the default behavior
should not occur); false otherwise (i.e., the default behavior should occur). The
default behavior is for the camera to move to the marker and an info window to appear.