build(aio): switch from @angular/http to @angular/common/http

```
$ ls -l dist/*.js

 14942            dist/0.b19e913fbdd6507d346b.chunk.js
  1535            dist/inline.a1b446562b36eebb766d.bundle.js
524385  (+  682)  dist/main.19fec4390ff7837ee6ef.bundle.js
 37402            dist/polyfills.9f7e0e53bce2a6c8326e.bundle.js
 54001            dist/worker-basic.min.js

632265  (+  682)  total
```

aio/src/app/embedded/api/api-list.component.spec.ts

@@ -26,10 +26,6 @@ describe('ApiListComponent', () => {
     sections = getApiSections();
   });
 
-  it('should be creatable', () => {
-    expect(component).toBeDefined();
-  });
-
   /**
    * Expectation Utility: Assert that filteredSections has the expected result for this test
    * @param itemTest - return true if the item passes the match test