*feels old remembering when Elon promised this feature for Model S*
S-Voice on Samsung phones will do this, but you have to select the phone for audio first on the touchscreen.
There's a lot of room for updates to the infotainment / phone pairing capabilities...
My wife's Traverse will allow her iPhone to pre-empt the (non-Bluetooth) in-car audio when it has something important to say - for example, when Waze wants to say "police reported ahead", her air conditioner will drop to low, radio will lower volume, you hear the phone's message. The only annoying part is that the car insists on finishing with "call ended". The Tesla won't do this, and I wish it would.
Her Traverse also can trigger Siri and S-Voice by holding down the voice command button and saying "bluetooth voice", at which point you can tell it to read messages, call someone, search the web, etc.