Do not overload send as this causes issues with folly::dynamic

Summary:
folly::dynamic, std::string, implicit constructors and method overloading is not a good combination.

This renames the send method to sendRaw as to avoid issues with existing plugins currently sending string params.

Reviewed By: mweststrate

Differential Revision: D38827539

fbshipit-source-id: 653f62e41ebfbe93d1af25f39c81f6b05bf84cb4

xplat/Flipper/FlipperConnection.h

@@ -38,7 +38,9 @@ class FlipperConnection {
    identifier.
    Note: The `message` argument is expected to contain a valid JSON.
    */
-  virtual void send(const std::string& method, const std::string& params) = 0;
+  virtual void sendRaw(
+      const std::string& method,
+      const std::string& params) = 0;
 
   /**
   Report an error to the Flipper desktop app