AdGuard to update entry on updated hass.io discovery

[balloob]

Description:

When hass.io sends a discovery, check if there is new info, and if so, update the running config entry.

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[ghost]

Hey there @frenck, mind taking a look at this pull request as its been labeled with a integration (adguard) you are listed as a codeowner for? Thanks!

This is a automatic comment generated by codeowners-mention to help ensure issues and pull requests are seen by the right people.

[frenck]

Thanks, @balloob 👍
Much appreciated