Do you have a traditional wired doorbell? I use the Nexia that @JDRoberts mentioned above. It does require a customDH to incorporate into ST (installation instructions found here) . This will allow you to incorporate into virtually any automation.
Announcing via Google Home requires a bit more work. I use cast-web-api which for the purposes of this project, turns any google home into a speaker. It does require a local node server.
From here, I use the built-in speaker companion app to play a sound to select google homes in remote areas of my home.