Better handling of podcast metadata for locked screen artwork

[fdocr]

What type of PR is this? (check all applicable)

• [x] Refactor
• [ ] Feature
• [ ] Bug Fix
• [ ] Documentation Update

Description

Since 7303 was merged we will get relative paths for Podcast metadata when working on development. The PR handles relative paths in a separate function.

Added to documentation?

• [ ] docs.dev.to
• [ ] readme
• [x] no documentation needed