Delay sync for Google and limit updates to relevant info

[balloob]

Breaking change

Proposed change

Now that the cloud starts up faster, it was capturing entity registry changes it previously was not. Since Google does not allow partial sync like Alexa, it would update all entities, however, since this happened before Home Assistant was fully started, not all entities were loaded yet. Fixed this by using the delayed sync helper, which waits 15 seconds and is also used for preference updates.

Also updated both Alexa/Google entity registry listeners to only treat an entity registry update relevant if important attributes have changed.

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

Example entry for configuration.yaml:

# Example configuration.yaml

Additional information

• This PR fixes or closes issue: fixes Z-Wave and MQTT integration devices disappearing from Google Home when restarting Home Assistant #34578
• This PR is related to issue:
• Link to documentation pull request:

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

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  Updated and included derived files by running: python3 -m script.hassfest.
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  Updated by running python3 -m script.gen_requirements_all.
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[probot-home-assistant]

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