Introduce "service provider" to access commonly uses service

[lacasseio]

Some services are accessible via Project instance (although they are being slimed down in newer Gradle). However, some services are useful but only offered via @Inject. One example is SoftwareComponentFactory. We built a SoftwareComponentRegistry to remove the need for the service but in some cases, the service is required.

We should offer something along the lines of:

@NonExtensible
public abstract class SoftwareComponentFactoryProvider {
  SoftwareComponentFactory get();
}