Your blueberry plant is looking a lot better then mine!
Edit: as bamboo says this is probably not a blueberry after all.
The calyx end of a blueberry forms an indented perfect 5 point star, and your berries are flat.
The lilac color looks good.
Your leaves are also widely serrated, but the serrations on my plants are very fine, and are more easily felt then seen.
The leaves are alternating on a brown stem with no thorns as they should but I think one should see vegetative budding at the base of the leaves by late summer, early autumn.
One might also expect to see a little red in the leafs.
I guess if the berries don't turn blue you have your answer.