## Description
- Refactored PersonFaceWidget into separate FileFaceWidget and
PersonFaceWidget. PersonFaceWidget now only requires a person or cluster
ID, no longer is any file needed
- Face thumbnail choice is now made based on highest face score instead
of recency, meaning less changes in face thumbnails and less re-computes
- More aggressive caching of face thumbnails in memory
- Added option to change person cover from top menu
- Fixed issue with decoding HEIC for face thumbnails on Android
## Tests
Tested in debug mode on my pixel 8.
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