Replace $FlowFixMe in RCTDeviceEventEmitter (#48758)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/48758

Changelog:
[General][Changed] - Replaced $FlowFixMe in RCTDeviceEventEmitter with any

Reviewed By: rshest

Differential Revision: D68327375

fbshipit-source-id: 30f65308f81d6349c191900ce16036741e71efae

packages/react-native/Libraries/EventEmitter/RCTDeviceEventEmitter.js

@@ -14,7 +14,8 @@ import {beginEvent, endEvent} from '../Performance/Systrace';
 import EventEmitter from '../vendor/emitter/EventEmitter';
 
 // FIXME: use typed events
-type RCTDeviceEventDefinitions = $FlowFixMe;
+/* $FlowFixMe[unclear-type] unclear type of events */
+type RCTDeviceEventDefinitions = {[name: string]: Array<any>};
 
 /**
  * Global EventEmitter used by the native platform to emit events to JavaScript.

packages/react-native/Libraries/__tests__/__snapshots__/public-api-test.js.snap

@@ -4630,7 +4630,7 @@ declare export default class NativeEventEmitter<TEventToArgsMap: { ... }>
 `;
 
 exports[`public API should not change unintentionally Libraries/EventEmitter/RCTDeviceEventEmitter.js 1`] = `
-"type RCTDeviceEventDefinitions = $FlowFixMe;
+"type RCTDeviceEventDefinitions = { [name: string]: Array<any> };
 declare export default IEventEmitter<RCTDeviceEventDefinitions>;
 "
 `;