music: handle null mediastore album name

Mostly a band-aid to make null album names correspond to a folder name
(the standard MediaStore behavior).

app/src/main/java/org/oxycblt/auxio/music/fs/MediaStoreExtractor.kt

@@ -283,7 +283,10 @@ private class MediaStoreExtractorImpl(
             // the file is not actually in the root internal storage directory. We can't do
             // anything to fix this, really. We also can't really filter it out, since how can we
             // know when it corresponds to the folder and not, say, Low Roar's breakout album "0"?
-            rawSong.albumName = cursor.getString(albumIndex)
+            // Also, on some devices it's literally just null. To maintain behavior sanity just
+            // replicate the majority behavior described prior.
+            rawSong.albumName = cursor.getStringOrNull(albumIndex)
+                ?: requireNotNull(rawSong.path?.name) { "Invalid raw: No path" }
             // Android does not make a non-existent artist tag null, it instead fills it in
             // as <unknown>, which makes absolutely no sense given how other columns default
             // to null if they are not present. If this column is such, null it so that