Fix Philips TV none recordings_list

[Floyer007]

Proposed change

The newly added added recording_list functionality for philips_js 01c49ba has a bug, which did not occured while developing.
It was missed to add a scenario in which the TV has the right API and has the needed functionality.
Neverless for some TV the recordings_list is not available if the TV is off or in StandBy.

This PR adds a check prior accessing the data to prevent an error.

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)
• Deprecation (breaking change to happen in the future)
• 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 Error with new binary sensor for recodings in philips_js integration #104610

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• The code change is tested and works locally.
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• Tests have been added to verify that the new code works.

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[home-assistant]

Hey there @elupus, mind taking a look at this pull request as it has been labeled with an integration (philips_js) you are listed as a code owner for? Thanks!

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[elupus]

I simplified the checks, need to go into beta so should be as simple as possible

[Floyer007]

I simplified the checks, need to go into beta so should be as simple as possible

Thank you for the commit, I had no time yesterday.