Support emitting typed RCTDeviceEmitter events

Summary:
This enables to code-gen base C++ types for custom exported JS types from a RN TM spec - which have been previously excluded from code-gen as these aren't used in any function.

The only work around so far was to ‘register’ a random function using the custom type which should be used for RCTDeviceEventEmitter events

Changelog: [Internal]

Reviewed By: rshest

Differential Revision: D56685903

fbshipit-source-id: add9ca40018b91c9fca98609ba3d1f85d3affec1

packages/rn-tester/NativeCxxModuleExample/NativeCxxModuleExample.cpp

@@ -180,15 +180,18 @@ void NativeCxxModuleExample::setMenu(jsi::Runtime& rt, MenuItem menuItem) {
 
 void NativeCxxModuleExample::emitCustomDeviceEvent(
     jsi::Runtime& rt,
-    jsi::String eventName) {
+    const std::string& eventName) {
   // Test emitting device events (RCTDeviceEventEmitter.emit) from C++
-  // TurboModule with arbitrary arguments
+  // TurboModule with arbitrary arguments. This can be called from any thread
   emitDeviceEvent(
-      eventName.utf8(rt).c_str(),
-      [](jsi::Runtime& rt, std::vector<jsi::Value>& args) {
+      eventName,
+      [jsInvoker = jsInvoker_](
+          jsi::Runtime& rt, std::vector<jsi::Value>& args) {
         args.emplace_back(jsi::Value(true));
         args.emplace_back(jsi::Value(42));
         args.emplace_back(jsi::String::createFromAscii(rt, "stringArg"));
+        args.emplace_back(bridging::toJs(
+            rt, CustomDeviceEvent{"one", 2, std::nullopt}, jsInvoker));
       });
 }