Definitely Coprosma hirtella, plant is female. I haven't noticed flowers and fruit at the same time before. Some of the leaves appear to possibly show evidence of infection by a rust pathogen.
No - I don't think it's C. decumbens, as its anthers are more exserted from the flower (e.g. see https://www.anbg.gov.au/photo/apii/id/dig/50589). At that location it would definitely be either planted or self sown from a cultivated plant.