AsyncSocket.getFd to AsyncSocket.getNetworkSocket
AsyncSocket.getFd to AsyncSocket.getNetworkSocket

Reviewed By: yfeldblum

Differential Revision: D13603396

fbshipit-source-id: 90d2ce9e4d3cfc681e27df84e8e989c7cee182cc

facebook/mcrouter,facebook/mcrouter,facebook/mcrouter,facebook/mcrouter