F-Droid: Funkwhale application logo should be used

Describe the bug

The Funkwhale application logo should be used on the application details page

How to reproduce

1. Add the FFA F-Droid repository to the F-Droid client and update packages
2. Search for Funkwhale
3. Click on the search result to open the app details page
4. Not the default android icon used as the app icon

Expected behavior

The official Funkwhale icon should be used

Screenshots

Context

https://matrix.to/#/!ABWvRYooyooElXBrcj:tchncs.de/$RnTstMody47vFmM-rGiIsiEm6zGfMVM7CwEXLxqbDZ4?via=tchncs.de&via=matrix.org&via=nordgedanken.dev