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.h

@@ -116,6 +116,17 @@ template <>
 struct Bridging<MenuItem>
     : NativeCxxModuleExampleCxxMenuItemBridging<MenuItem> {};
 
+#pragma mark - RCTDeviceEventEmitter events
+
+using CustomDeviceEvent = NativeCxxModuleExampleCxxCustomDeviceEvent<
+    std::string,
+    int32_t,
+    std::optional<float>>;
+
+template <>
+struct Bridging<CustomDeviceEvent>
+    : NativeCxxModuleExampleCxxCustomDeviceEventBridging<CustomDeviceEvent> {};
+
 #pragma mark - implementation
 class NativeCxxModuleExample
     : public NativeCxxModuleExampleCxxSpec<NativeCxxModuleExample> {
@@ -185,7 +196,7 @@ class NativeCxxModuleExample
 
   void setMenu(jsi::Runtime& rt, MenuItem menuItem);
 
-  void emitCustomDeviceEvent(jsi::Runtime& rt, jsi::String eventName);
+  void emitCustomDeviceEvent(jsi::Runtime& rt, const std::string& eventName);
 
   void voidFuncThrows(jsi::Runtime& rt);