I got excited because I thought it would be soon, then I saw this:
“Mazda has been a CarPlay and Android Auto partner since 2014, so it is no secret that we are developing both systems to interface with our Mazda Connect infotainment system. Both software systems should be retroactively upgradable onto all Mazda Connect systems with a potentially minimal hardware addition needed. Mazda does not yet have an official timeline for when these should be available or at what cost, however.”
They've been working on it since 2014, and have not yet given an official timeline. I'm not holding my breath on this! I'll believe it once I see it in my car.