Fix slider goes to 0 when flow is collect again

[StaehliJ]

Pull request

Description

• Self-explanatory

Changes made

• Self-explanatory

Checklist

• Your branch has been rebased onto the main branch.
• APIs have been properly documented (if relevant).
• The documentation has been updated (if relevant).
• New unit tests have been written (if relevant).
• The demo has been updated (if relevant).
• All pull request status checks pass.

[github-actions]

Code Coverage

Overall Project	45.93%	🟢
Files changed	100%	🟢

Module	Coverage
:pillarbox-player	62.52%	🟢

Files

Module	File	Coverage
:pillarbox-player	PlayerCallbackFlow.kt	72.58%	🟢