Fix the check for Mac address in kef integration (#106072)
It might be due to an update of `getmac` dependency in some case the mac
was resolved to "00:00:00:00:00:00" instead of the anticipated `None`.
With that the original bug #47678 where a duplicated entity would be
created in case of HA is restarted while the KEF speaker is offline
came back. The PR #52902 was applied back in time to fix that issue.
Now, this change is a continuation of the previous efforts. The solution
was tested for about two months and it does address the bug with
creating duplicated entities in case of KEF speakers being offline.
* add services for DSP
* add homeassistant/components/kef/const.py
* add services.yaml
* fix set_mode
* fix services
* media_player.py fixes
* bump aiokef to 0.2.9
* update requirements_all.txt
* add basic sensor.py
* add DSP settings as attributes
* add message about kef.update_dsp
* remove sensor.py
* fix pylint issues
* update_dsp inside async_added_to_hass
* use {...} instead of dict(...)
* get DSP settings when connecting to HA or once on update
* simplify condition
* do not get mode twice
* remove async_added_to_hass
* use async_register_entity_service
* remove entity_id from schema and prepend _value
* invalidate self._dsp after setting a DSP setting
* schedule update_dsp every hour
* subscribe and unsubscribe on adding and removing to HA
* don't pass hass and set _update_dsp_task_remover to None after removing
* KEF: add support for play, pause, next track, and previous track
* bump aiokef to 0.2.7
* run isort
* do not dynamically change the supported features
* add KEF speakers platform for the integration
This will work with the KEF LS50 Wireless and KEF LSX speakers.
The development of this code happened on https://github.com/basnijholt/media_player.kef
* rename DATA_KEF -> DOMAIN
* use aiokef v0.2.0 and support LSX and new features
* sort imports
* fix @MartinHjelmare's suggestions
* remove _CONFIGURING
* change STATE_UNKNOWN to None
* use lat and long for unique_id
* bump aiokef to v0.2.2
* use config[ATTR] instead of config.get(ATTR)
* use getmac
* fix case when MAC is None
* use host as instance lifetime id
* fix requirements
