Harden telemetry event dispatch

[tobrun]

Closes #8650, this PR introduces a wrapper implementation of MapboxEvent. This is needed to ignore events when the Map isn't ready to handle them (when we don't have a camera position to get the zoom level from). A use-case where this can occur is running monkeyrunner, note that I haven't been able to reproduce with normal behavior.

[Larnoo]

+    try {
 +      return MapboxEvent.buildMapClickEvent(location, gestureId, transform.getZoom());
 +    } catch (NullPointerException exception) {
 +      // Map/Transform is not ready yet #8650
 +      // returning null is valid, event is ignored.
 +      return null;
 +    }

why catch NPE? If catch NPE, other object is null will hidden the problem.
catching Exception is costly.

I think should do as follow.

if(transform==null){
//the transform is null; can't do anything. or print log.
  return null;
}