So I was poking around on the OTHER Tacoma forum (the shitty toxic one, you know where) and they had discovered that there is a new update for the headunits. 2017-2019 confirmed as I saw but no reason 2016 shouldn't be included. It's not Android Auto or Car Play but at least it's an update. Sounds like you might need Entune on your phone for it to kick off. I'll do some testing today.
And if you want to see the thread here is the link, abandon all hope ye who enter here:
https://www.tacomaworld.com/threads/alexa-update-2019-tacoma.672970/
EDIT: Looking at the Entune app, it looks like this was announced on July 6th
And if you want to see the thread here is the link, abandon all hope ye who enter here:
https://www.tacomaworld.com/threads/alexa-update-2019-tacoma.672970/
EDIT: Looking at the Entune app, it looks like this was announced on July 6th