Feature/get groupable players 2342

[dan-s-github]

Proposed change

This PR implements the service portion of the feature request from Discussion #2342, adding media_player.get_groupable_players service that allows users and automations to dynamically discover which media players can be grouped together for synchronous playback.

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 #
• This PR is related to issue: Discussion Upgrade psutil to 4.3.0 home-assistant/core#2342](https://github.com/orgs/home-assistant/discussions/2342)
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
• 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
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

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.

To help with the load of incoming pull requests:

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

[Copilot]

Pull request overview

This PR adds a new get_groupable_players service to the media_player component that returns a list of media players that can be grouped together for synchronized playback. The service is restricted to entities with GROUPING feature support and returns only players from the same platform as the calling entity.

Changes:

• Adds new service get_groupable_players with service response support
• Implements async_get_groupable_players method that filters media players by platform and GROUPING feature
• Includes comprehensive test coverage for the new service functionality

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
homeassistant/components/media_player/init.py	Adds entity_registry import, registers new service, and implements async_get_groupable_players method
homeassistant/components/media_player/const.py	Defines SERVICE_GET_GROUPABLE_MEMBERS constant
homeassistant/components/media_player/services.yaml	Adds service definition and includes unrelated max value change
homeassistant/components/media_player/strings.json	Adds service name and description
homeassistant/components/media_player/icons.json	Adds service icon
tests/components/media_player/test_init.py	Adds 4 test cases covering basic functionality, feature validation, platform filtering, and multiplatform scenarios

[Copilot]

@dan-s-github I've opened a new pull request, #3, to work on those changes. Once the pull request is ready, I'll request review from you.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 6 comments.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated no new comments.