feat: v3.5.0 - instant home feed, SAF display path, per-app language

- Cache home feed to SharedPreferences for instant restore on app launch
- Resolve SAF tree URIs to human-readable paths (e.g. /storage/emulated/0/Music)
- Add Android 13+ per-app language support (locale_config.xml)
- Bump version to 3.5.0+73

pubspec.yaml

@@ -1,7 +1,7 @@
 name: spotiflac_android
 description: Download Spotify tracks in FLAC from Tidal, Qobuz & Amazon Music
 publish_to: "none"
-version: 3.4.0+72
+version: 3.5.0+73
 
 environment:
   sdk: ^3.10.0