dispose method
Disposes all stream controllers.
Implementation
void dispose() {
_locationController.close();
_motionChangeController.close();
_activityChangeController.close();
_providerChangeController.close();
_geofenceController.close();
_connectivityController.close();
_httpController.close();
_heartbeatController.close();
_enabledChangeController.close();
_powerSaveController.close();
_powerStateController.close();
_tripEventController.close();
_workflowController.close();
_eventsController.close();
_errorController.close();
}