Add bluez to the devcontainer

[chemelli74]

Proposed change

Add bluez installation task to dev container

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:
• 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
• 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.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.
• Untested files have been added to .coveragerc.

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To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[ludeeus]

I don't have an issue with adding this, but I'll request a second opinion for it.

[elupus]

Why hasn't this been an issue before. There was a ble device tracker before that used bluez.

Seems a bit strange to point out fjäråskupan specifically here. Seems likely to be outdated once other tests are added?

[ludeeus]

When VSCode runs the test discovery for the fjaraskupan integration, https://github.com/hbldh/bleak/blob/develop/bleak/__init__.py#L36 is loaded/executed.

[elupus]

I'm fine with it. I would probably have just dropped the comment or mentioning "bleak' python package as initial source. But it's no difference from need of libs format, and those don't mention why it's added.

[chemelli74]

I don't have an issue with adding this, but I'll request a second opinion for it.

Should be all set now, right ?

Simone