fix(Core): Allow SanitizationService to be overriden by the end-user Injector.
fix(Core): Allow SanitizationService to be overriden by the end-user Injector.

This is a workaround for an internal client relying on this behavior, but we expect to make this impossible in the near future, as it is a potential security flaw to be able to disable the sanitizer.

PiperOrigin-RevId: 191663712

chalin/angular2,angulardart/angular,matanlurey/angular,chalin/angular2,matanlurey/angular,matanlurey/angular,angulardart/angular,chalin/angular2,angulardart/angular