Add support for event information in React scheduler tracks in React Native (facebook#35947)

## Summary

This defines the same fiber configuration for RN as used in DOM, so we
can expose event timing information in the React scheduler tracks in
performance traces.

This was unblocked by facebook#35913 and facebook#35912.

## How did you test this change?

Manually compiled the renderer and tested e2e in FB infra: 
<img width="1217" height="161" alt="Screenshot 2026-03-03 at 10 10 44"
src="https://github.com/user-attachments/assets/6ca1512e-dcaf-49cf-8da9-1c6ae554733a"
/>

Author: rubennorte

packages/react-native-renderer/src/ReactFiberConfigFabric.js

@@ -422,14 +422,48 @@ export function resolveUpdatePriority(): EventPriority {
   return DefaultEventPriority;
 }
 
-export function trackSchedulerEvent(): void {}
+let schedulerEvent: void | Event = undefined;
+export function trackSchedulerEvent(): void {
+  schedulerEvent = global.event;
+}
+
+function getEventType(event: Event): null | string {
+  if (event.type) {
+    return event.type;
+  }
+
+  // Legacy implementation. RN does not define the `type` property on the event object yet.
+  // $FlowExpectedError[prop-missing]
+  const dispatchConfig = event.dispatchConfig;
+  if (
+    dispatchConfig == null ||
+    dispatchConfig.phasedRegistrationNames == null
+  ) {
+    return null;
+  }
+
+  const rawEventType =
+    dispatchConfig.phasedRegistrationNames.bubbled ||
+    dispatchConfig.phasedRegistrationNames.captured;
+  if (!rawEventType) {
+    return null;
+  }
+
+  if (rawEventType.startsWith('on')) {
+    return rawEventType.slice(2).toLowerCase();
+  }
+
+  return rawEventType.toLowerCase();
+}
 
 export function resolveEventType(): null | string {
-  return null;
+  const event = global.event;
+  return event && event !== schedulerEvent ? getEventType(event) : null;
 }
 
 export function resolveEventTimeStamp(): number {
-  return -1.1;
+  const event = global.event;
+  return event && event !== schedulerEvent ? event.timeStamp : -1.1;
 }
 
 export function shouldAttemptEagerTransition(): boolean {