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/core/src/view/refs.ts

@@ -311,7 +311,8 @@ class TemplateRef_ extends TemplateRef<any> implements TemplateData {
   /**
    * @internal
    */
-  _projectedViews: ViewData[];
+  // TODO(issue/24571): remove '!'.
+  _projectedViews !: ViewData[];
 
   constructor(private _parentView: ViewData, private _def: NodeDef) { super(); }
 
@@ -479,9 +480,11 @@ class NgModuleRef_ implements NgModuleData, InternalNgModuleRef<any> {
   private _destroyListeners: (() => void)[] = [];
   private _destroyed: boolean = false;
   /** @internal */
-  _providers: any[];
+  // TODO(issue/24571): remove '!'.
+  _providers !: any[];
   /** @internal */
-  _modules: any[];
+  // TODO(issue/24571): remove '!'.
+  _modules !: any[];
 
   readonly injector: Injector = this;