fix(core): remove EventListener from it's exports

With dts bundles, `core.d.ts` will include an `EventListener` class as it's used in https://github.com/angular/angular/blob/303eae918d997070a36b523ddc97e018f622c258/packages/core/src/debug/debug_node.ts#L32

This will conflict with the DOM EventListener, as anything in `core.d.ts` which is using the DOM EventListener will fallback in using the one defined in the same module and hence build will fail because their implementation is different.

With this change, we rename the local `EventListener` to `DebugEventListener`, the later one is non exported.

Fixes #29806

packages/core/src/debug/debug_node.ts

@@ -21,15 +21,15 @@ import {getComponentViewByIndex, getNativeByTNode, isComponent, isLContainer} fr
 import {assertDomNode} from '../util/assert';
 import {DebugContext} from '../view/index';
 
-export class EventListener {
+export class DebugEventListener {
   constructor(public name: string, public callback: Function) {}
 }
 
 /**
  * @publicApi
  */
 export interface DebugNode {
-  readonly listeners: EventListener[];
+  readonly listeners: DebugEventListener[];
   readonly parent: DebugElement|null;
   readonly nativeNode: any;
   readonly injector: Injector;
@@ -39,7 +39,7 @@ export interface DebugNode {
   readonly providerTokens: any[];
 }
 export class DebugNode__PRE_R3__ {
-  readonly listeners: EventListener[] = [];
+  readonly listeners: DebugEventListener[] = [];
   readonly parent: DebugElement|null = null;
   readonly nativeNode: any;
   private readonly _debugContext: DebugContext;
@@ -219,7 +219,7 @@ class DebugNode__POST_R3__ implements DebugNode {
   }
   get context(): any { return getContext(this.nativeNode as Element); }
 
-  get listeners(): EventListener[] {
+  get listeners(): DebugEventListener[] {
     return getListeners(this.nativeNode as Element).filter(isBrowserEvents);
   }
 

packages/core/src/view/services.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {DebugElement__PRE_R3__, DebugNode__PRE_R3__, EventListener, getDebugNode, indexDebugNode, removeDebugNodeFromIndex} from '../debug/debug_node';
+import {DebugElement__PRE_R3__, DebugNode__PRE_R3__, DebugEventListener, getDebugNode, indexDebugNode, removeDebugNodeFromIndex} from '../debug/debug_node';
 import {Injector} from '../di';
 import {InjectableType} from '../di/injectable';
 import {InjectableDef, getInjectableDef} from '../di/interface/defs';
@@ -827,7 +827,7 @@ export class DebugRenderer2 implements Renderer2 {
     if (typeof target !== 'string') {
       const debugEl = getDebugNode(target);
       if (debugEl) {
-        debugEl.listeners.push(new EventListener(eventName, callback));
+        debugEl.listeners.push(new DebugEventListener(eventName, callback));
       }
     }
 

tools/public_api_guard/core/core.d.ts

@@ -228,7 +228,7 @@ export interface DebugNode {
     readonly componentInstance: any;
     readonly context: any;
     readonly injector: Injector;
-    readonly listeners: EventListener[];
+    readonly listeners: DebugEventListener[];
     readonly nativeNode: any;
     readonly parent: DebugElement | null;
     readonly providerTokens: any[];