Problem to solve:
tts.google_say interupts any media playing on a device and overrides it with the mp3 file with the speach
Use the “broadcast” feature of the Google Assistant instead.
If I use Google Assistant on my smartphone and type to it “Broadcast [insert broadcast]” it will send those messages to my Google Homes throughout the house as Google Assistant speaking them, and if I say certain things like “Dinner Time” or “Good Morning” or “Goodnight” it broadcasts specific little Google Assistant clips for the message instead. I’d like for Home Assistant to be able to sent a notification to my Google Homes this way. Sure, the tts.googlesay technically can do something functionally similar to this already, but it overrides any media that may be playing on the speaker, where the broadcast feature does not.
I understand this would likely require an API key of some kind, just like the “sync devices” button does in the Google Assistant component, so maybe this just is an extra feature for that component specifically. I’d like to be able to say notify.googlehome “Dinner’s ready” and for HA to do the same thing that me doing “Broadcast Dinner’s ready” would do.