Try to automatically detect zones on first run of Monoprice integration

[OnFreund]

Proposed change

Try to automatically detect zones on first run, by checking for failures. A failed extension zone (21..26, 31..36), will be enabled if update() succeeded, and disabled if it failed. Zones 11..16 will be enabled regardless.

After the first run, don't call update() before adding to the entity registry on subsequent runs, to speed boot up and avoid warnings.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue: Monoprice: zones 21-26 and 31-36 do not show up in Lovelace starting from 0.108 #34035
• Link to documentation pull request: Automatic zone detection in Monoprice home-assistant.io#13407

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• Untested files have been added to .coveragerc.

The integration reached or maintains the following Integration Quality Scale:

• No score or internal
• 🥈 Silver
• 🥇 Gold
• 🏆 Platinum

[probot-home-assistant]

Hey there @etsinko, mind taking a look at this pull request as its been labeled with a integration (monoprice) you are listed as a codeowner for? Thanks!
_{^{(message by CodeOwnersMention)}}

[OnFreund]

Is there any way to move this to "Needs Review" instead of "By Code Owner"? I don't think @etsinko is active anymore.

[MartinHjelmare]

Looks good!