Add roku direct tuner channel selection

[quinnhosler]

Proposed change

The Roku media_player component already supports media_player.select_source for many apps and inputs. However, it lacked the ability to specify the desired antenna/digital tuner channel through this service, even though this is supported roku and the python module. This small change enables the media_player.select_source service to change to the desired channel given correctly formatted input.

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

See Roku documentation for proper formatting in selecting tuner channel (already referenced in documentation)

entity_id: media_player.tv
source: tvinput.dtv?ch=5.1

• 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.
• Untested files have been added to .coveragerc.

The integration reached or maintains the following Integration Quality Scale:

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[probot-home-assistant]

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

[ctalkington]

I belive this should use play_media service instead see how directv implements:

core/homeassistant/components/directv/media_player.py

Lines 320 to 331 in ab1eda7

	async def async_play_media(self, media_type, media_id, **kwargs):
	"""Select input source."""
	if media_type != MEDIA_TYPE_CHANNEL:
	_LOGGER.error(
	"Invalid media type %s. Only %s is supported",
	media_type,
	MEDIA_TYPE_CHANNEL,
	)
	return
	_LOGGER.debug("Changing channel on %s to %s", self._name, media_id)
	await self.dtv.tune(media_id, self._address)

[quinnhosler]

I think you're right! #34124