销毁定位,释放定位资源, 当不再需要进行定位时调用此方法
该方法会释放所有定位资源,调用后再进行定位需要重新实例化AMapLocationClient
Destroy location, release location resources, call this method when location is no longer needed
This method will release all location resources, and re-instantiate AMapLocationClient is required for further location after calling