refactor(cdk-experimental/popover-edit): inconsistency in Angular 19

Fixes some inconsistencies that showed up in the popover edit tests after the update to v19.

src/cdk-experimental/popover-edit/table-directives.ts

@@ -21,6 +21,7 @@ import {
 } from '@angular/core';
 import {fromEvent, fromEventPattern, merge, Subject} from 'rxjs';
 import {
+  debounceTime,
   filter,
   map,
   mapTo,
@@ -136,10 +137,12 @@ export class CdkEditable implements AfterViewInit, OnDestroy {
       // or below the table.
       this._rendered
         .pipe(
+          // Avoid some timing inconsistencies since Angular v19.
+          debounceTime(0),
           // Optimization: ignore dom changes while focus is within the table as we already
           // ensure that rows above and below the focused/active row are tabbable.
           withLatestFrom(this.editEventDispatcher.editingOrFocused),
-          filter(([_, activeRow]) => activeRow == null),
+          filter(([_, activeRow]) => activeRow === null),
           map(() => element.querySelectorAll(ROW_SELECTOR)),
           share(),
           takeUntil(this.destroyed),