Revert "refactor(ngcc): remove unused import (#42062)" (#43033)

This reverts commit 42265cca1c.

PR Close #43033

packages/compiler-cli/ngcc/test/execution/helpers.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 import {DepGraph} from 'dependency-graph';
-import {DtsProcessing, PartiallyOrderedTasks} from '../../src/execution/tasks/api';
+import {DtsProcessing, PartiallyOrderedTasks, Task} from '../../src/execution/tasks/api';
 import {EntryPoint, EntryPointJsonProperty} from '../../src/packages/entry_point';
 
 /**