After update from core-2022.7.7 to 2022.8 - notification on Android not work.
The integration is still ON, but in developer tools, there isnt possible to send any notification dto TV - its not visible,
Not for me. Works all as it should, had numerous notifications this evening. 
Not a solution, but maybe try a restart of the app on the TV and for the intgeration in HA.
i must remove, and add once again the integration.
Then in developer tools its working, but still error with notification
In my case notifications on android tv are working. I have 2022.8
Mine stopped working too immediately after upgrading to 2022.8 on two Android TV boxes. Removing and re-adding the integration for both fixed it for me.