build(bazel): Turning on strictPropertyInitialization for Angular. (#24572)

All errors for existing fields have been detected and suppressed with a
`!` assertion.

Issue/24571 is tracking proper clean up of those instances.

One-line change required in ivy/compilation.ts, because it appears that
the new syntax causes tsickle emitted node to no longer track their
original sourceFiles.

PR Close #24572

packages/platform-webworker/src/worker_render.ts

@@ -29,8 +29,10 @@ import {MessageBasedRenderer2} from './web_workers/ui/renderer';
  */
 @Injectable()
 export class WebWorkerInstance {
-  public worker: Worker;
-  public bus: MessageBus;
+  // TODO(issue/24571): remove '!'.
+  public worker !: Worker;
+  // TODO(issue/24571): remove '!'.
+  public bus !: MessageBus;
 
   /** @internal */
   public init(worker: Worker, bus: MessageBus) {