Add RawEventTelemetryEventEmitter interface to ReactNativePrivateInterface

Summary:
This will be used from the React JS renderer in a followup PR.

Changelog: [Added][JS] New event telemetry mechanism exposed from JS to supercede the Pressability-specific telemetry mechanism

Reviewed By: ryancat

Differential Revision: D33986916

fbshipit-source-id: 912d0b351869348f0ca6e5f6a882fc0501c2c7f0

Author: JoshuaGross

Libraries/Core/RawEventTelemetryEventEmitter.js

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+import EventEmitter from '../vendor/emitter/EventEmitter';
+import type {IEventEmitter} from '../vendor/emitter/EventEmitter';
+
+export type RawEventTelemetryEvent = $ReadOnly<{|
+  eventName: string,
+  // We expect, but do not/cannot require, that nativeEvent is an object
+  // with the properties: key, elementType (string), type (string), tag (numeric),
+  // and a stateNode of the native element/Fiber the event was emitted to.
+  nativeEvent: {[string]: mixed},
+|}>;
+
+type RawEventDefinitions = {
+  [eventChannel: string]: [RawEventTelemetryEvent],
+};
+
+const RawEventTelemetryEventEmitter: IEventEmitter<RawEventDefinitions> =
+  new EventEmitter<RawEventDefinitions>();
+
+export default RawEventTelemetryEventEmitter;

Libraries/ReactPrivate/ReactNativePrivateInterface.js

@@ -21,6 +21,7 @@ import typeof flattenStyle from '../StyleSheet/flattenStyle';
 import {type DangerouslyImpreciseStyleProp} from '../StyleSheet/StyleSheet';
 import typeof ReactFiberErrorDialog from '../Core/ReactFiberErrorDialog';
 import typeof legacySendAccessibilityEvent from '../Components/AccessibilityInfo/legacySendAccessibilityEvent';
+import typeof RawEventTelemetryEventEmitter from '../Core/RawEventTelemetryEventEmitter';
 
 // flowlint unsafe-getters-setters:off
 module.exports = {
@@ -62,4 +63,7 @@ module.exports = {
   get legacySendAccessibilityEvent(): legacySendAccessibilityEvent {
     return require('../Components/AccessibilityInfo/legacySendAccessibilityEvent');
   },
+  get RawEventTelemetryEventEmitter(): RawEventTelemetryEventEmitter {
+    return require('../Core/RawEventTelemetryEventEmitter').default;
+  },
 };