Bump androidtv to 0.0.25 and add tests (#26202)

* Add tests for androidtv

* Test that the error and reconnection attempts are logged correctly.

> "Handles device/service unavailable. Log a warning once when
> unavailable, log once when reconnected."

https://developers.home-assistant.io/docs/en/integration_quality_scale_index.html

* Clarify comment

* Add test for when the ADB shell command returns None

* Bump androidtv to 0.0.25