Implement CommConstants HostObject with NATIVE_MESSAGE_TYPES property in C++

Summary: This differential implements CommValidationModule validateMessageTypes method.

Test Plan: Build the app. We don't have a way to call this method yet.

Reviewers: bartek, atul

Reviewed By: bartek

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D8070