Android TV Remote integration (#89935)

* Android TV Remote integration

* Add diagnostics

* Remove test pem files from when api was not mocked

* Address review comments

* Remove hass.data call in test

* Store the certificate and key in /config/.storage

* update comments

* Update homeassistant/components/androidtv_remote/__init__.py

Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>

* import callback

* use async_generate_cert_if_missing

---------

Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>