Register RCTEventEmitter as callable module for Venice

Summary:
## Context
Trying to fix this js error
```
com.facebook.errorreporting.lacrima.common.exception.LacrimaJavascriptException: Error: Module RCTEventEmitter has not been registered as callable. Did you forget to call `RN$registerCallableModule`?, js build: UNKNOWN
```
https://fburl.com/logview/fvc33d48

Changelog:
[General][Changed] - Register RCTEventEmitter as callable module for Venice

Reviewed By: PeteTheHeat

Differential Revision: D27969226

fbshipit-source-id: 8e807ee5b2ef447b0bb49fa2107352d89584c181

Libraries/EventEmitter/RCTEventEmitter.js

@@ -14,7 +14,11 @@ const BatchedBridge = require('../BatchedBridge/BatchedBridge');
 
 const RCTEventEmitter = {
   register(eventEmitter: any) {
-    BatchedBridge.registerCallableModule('RCTEventEmitter', eventEmitter);
+    if (global.RN$Bridgeless) {
+      global.RN$registerCallableModule('RCTEventEmitter', () => eventEmitter);
+    } else {
+      BatchedBridge.registerCallableModule('RCTEventEmitter', eventEmitter);
+    }
   },
 };