fix(list,textfield): Fix TS 4.9 compliation of role property override.

PiperOrigin-RevId: 499312798

Author: dfreedm

list/lib/divider/list-divider.ts

@@ -13,7 +13,9 @@ import {ARIARole} from '../../../types/aria.js';
 /** @soyCompatible */
 export class ListDivider extends LitElement {
   @ariaProperty  // tslint:disable-line:no-new-decorators
+  // tslint:disable-next-line:decorator-placement
   @property({type: String, attribute: 'data-role', noAccessor: true})
+  // @ts-ignore(b/264292293): Use `override` with TS 4.9+
   role: ARIARole = 'separator';
 
   /** @soyTemplate */

list/lib/list.ts

@@ -38,7 +38,9 @@ export class List extends LitElement {
   ariaActivedescendant!: string;
 
   @ariaProperty  // tslint:disable-line:no-new-decorators
+  // tslint:disable-next-line:decorator-placement
   @property({type: String, attribute: 'data-role', noAccessor: true})
+  // @ts-ignore(b/264292293): Use `override` with TS 4.9+
   role: ARIARole = 'list';
 
   @property({type: String}) listId = '';

list/lib/listitem/list-item.ts

@@ -20,7 +20,9 @@ import {ifDefined} from 'lit/directives/if-defined.js';
 /** @soyCompatible */
 export class ListItem extends ActionElement {
   @ariaProperty  // tslint:disable-line:no-new-decorators
+  // tslint:disable-next-line:decorator-placement
   @property({type: String, attribute: 'data-role', noAccessor: true})
+  // @ts-ignore(b/264292293): Use `override` with TS 4.9+
   role: ARIARole = 'listitem';
 
   @ariaProperty  // tslint:disable-line:no-new-decorators

textfield/lib/text-field.ts

@@ -138,9 +138,12 @@ export abstract class TextField extends LitElement {
   @ariaProperty  // tslint:disable-line:no-new-decorators
   ariaLabelledBy!: string;
 
+  // tslint:disable:decorator-placement
   @property({type: String, attribute: 'data-role', noAccessor: true})
   @ariaProperty  // tslint:disable-line:no-new-decorators
+  // @ts-ignore(b/264292293): Use `override` with TS 4.9+
   role: ARIARole|null = null;
+  // tslint:enable:decorator-placement
 
   // FormElement
   get form() {