fixup! refactor(cdk-experimental/ui-patterns): track focus by item not index

Author: wagnermaciel

src/cdk-experimental/ui-patterns/behaviors/list-focus/list-focus.spec.ts

@@ -36,6 +36,7 @@ function getItems(length: number): Signal<ListFocusItem[]> {
         id: signal(`${i}`),
         disabled: signal(false),
         element: signal({focus: () => {}} as HTMLElement),
+        index: signal(i),
       };
     }),
   );

src/cdk-experimental/ui-patterns/behaviors/list-selection/list-selection.spec.ts

@@ -41,6 +41,7 @@ function getItems(length: number): Signal<TestItem[]> {
         id: signal(`${i}`),
         disabled: signal(false),
         element: signal({focus: () => {}} as HTMLElement),
+        index: signal(i),
       };
     }),
   );

src/cdk-experimental/ui-patterns/behaviors/list/list.spec.ts

@@ -44,6 +44,7 @@ describe('List Behavior', () => {
       element: signal(document.createElement('div')),
       disabled: signal(false),
       searchTerm: signal(String(value)),
+      index: signal(index),
     }));
   }