music: deduplicate by case

At some point, the switch to keying raw music information broke my
mitigation for duplicate tags that use similar cases. This then
crashed the music loader in certain cases. Fix it by making the
check use raw music keys.

Resolves #614

app/src/main/java/org/oxycblt/auxio/music/device/DeviceMusicImpl.kt

@@ -150,26 +150,26 @@ class SongImpl(
         val artistSortNames = separators.split(rawSong.artistSortNames)
         val rawIndividualArtists =
             artistNames
-                .mapIndexedTo(mutableSetOf()) { i, name ->
+                .mapIndexed { i, name ->
                     RawArtist(
                         artistMusicBrainzIds.getOrNull(i)?.toUuidOrNull(),
                         name,
                         artistSortNames.getOrNull(i))
                 }
-                .toList()
+                .distinctBy { it.key }
 
         val albumArtistMusicBrainzIds = separators.split(rawSong.albumArtistMusicBrainzIds)
         val albumArtistNames = separators.split(rawSong.albumArtistNames)
         val albumArtistSortNames = separators.split(rawSong.albumArtistSortNames)
         val rawAlbumArtists =
             albumArtistNames
-                .mapIndexedTo(mutableSetOf()) { i, name ->
+                .mapIndexed { i, name ->
                     RawArtist(
                         albumArtistMusicBrainzIds.getOrNull(i)?.toUuidOrNull(),
                         name,
                         albumArtistSortNames.getOrNull(i))
                 }
-                .toList()
+                .distinctBy { it.key }
 
         rawAlbum =
             RawAlbum(
@@ -195,10 +195,7 @@ class SongImpl(
         val genreNames =
             (rawSong.genreNames.parseId3GenreNames() ?: separators.split(rawSong.genreNames))
         rawGenres =
-            genreNames
-                .mapTo(mutableSetOf()) { RawGenre(it) }
-                .toList()
-                .ifEmpty { listOf(RawGenre()) }
+            genreNames.map { RawGenre(it) }.distinctBy { it.key }.ifEmpty { listOf(RawGenre()) }
 
         hashCode = 31 * hashCode + rawSong.hashCode()
         hashCode = 31 * hashCode + nameFactory.hashCode()