refactor(material/chips): switch tests away from fakeAsync

Reworks all the chips tests not to depend on `fakeAsync`.

Author: crisbeto

src/material/autocomplete/autocomplete.spec.ts

@@ -473,7 +473,7 @@ describe('MatAutocomplete', () => {
       ];
       fixture.changeDetectorRef.markForCheck();
       fixture.detectChanges();
-      await wait(0);
+      await wait(100);
       fixture.detectChanges();
 
       expect(fixture.componentInstance.openedSpy).toHaveBeenCalled();