Change all plugin uses of client.send to client.call
Change all plugin uses of client.send to client.call

Summary: client.send will be deprecated because it doesn't allow handling or detection of errors.

Reviewed By: passy

Differential Revision: D14084786

fbshipit-source-id: 7ebe4a7f3f8536c705e1c9302f38db0a34d99dc4

facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper