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/FlipperTestLib/FlipperConnectionManagerMock.h

@@ -40,7 +40,7 @@ class FlipperConnectionManagerMock : public FlipperConnectionManager {
     messages.push_back(message);
   }
 
-  void sendMessage(const std::string& message) override {
+  void sendMessageRaw(const std::string& message) override {
     messages.push_back(folly::parseJson(message));
   }