Add Kii Audio brand icons

[kiibart]

Proposed change

Add Kii Audio brand icons for the new kii_audio core integration.

Type of change

• Add a new logo or icon for a new core integration
• Add a missing icon or logo for an existing core integration
• Replace an existing icon or logo with a higher quality version
• Replace an existing icon or logo after a branding change
• Removing an icon or logo

Additional information

• This PR fixes or closes issue: fixes #
• Link to code base pull request: Add Kii Audio integration core#171694
• Link to documentation pull request: Add Kii Audio documentation home-assistant.io#45482
• Link to integration documentation on our website:

Checklist

• The added/replaced image(s) are PNG
• Icon image size is 256x256px (icon.png)
• hDPI icon image size is 512x512px for (icon@2x.png)
• Logo image size has min 128px, but max 256px, on the shortest side (logo.png)
• hDPI logo image size has min 256px, but max 512px, on the shortest side (logo@2x.png)

[kiibart]

I checked the PR diff and this PR only adds:

• core_integrations/kii_audio/icon.png
• core_integrations/kii_audio/icon@2x.png

The validation failure appears to come from existing electrolux files already present in both core_integrations and custom_integrations on upstream master, so I don’t think it is caused by this PR?