It's a pretty generic logo, so I highly doubt Apple copied this design.

I'll cross post what I wrote on their blog: "Perhaps you can take this opportunity to make the icon more refined. Apple's icon is how good the HipChat icon could have looked (and don't get me wrong, I love HipChat). Maybe that same amount of polish could go in to the new icon?"

Alternatively, they could go for something more radically different. This actually seems like a nice opportunity.