Add uploader name of streams as subtitle of MediaItems

They should be displayed only by Android Auto if they are known, i.e. when they
are not empty.

app/src/main/java/org/schabi/newpipe/player/mediabrowser/MediaBrowserConnector.java

@@ -139,6 +139,7 @@ private MediaItem createPlaylistStreamMediaItem(final long playlistId,
         final var builder = new MediaDescriptionCompat.Builder();
         builder.setMediaId(createMediaIdForPlaylistIndex(playlistId, index))
                 .setTitle(item.getStreamEntity().getTitle())
+                .setSubtitle(item.getStreamEntity().getUploader())
                 .setIconUri(Uri.parse(item.getStreamEntity().getThumbnailUrl()));
 
          return new MediaItem(builder.build(), MediaItem.FLAG_PLAYABLE);
@@ -207,6 +208,7 @@ private MediaItem createHistoryMediaItem(@NonNull final StreamHistoryEntry strea
         final var builder = new MediaDescriptionCompat.Builder();
         builder.setMediaId(ID_STREAM + '/' + streamHistoryEntry.getStreamId())
                 .setTitle(streamHistoryEntry.getStreamEntity().getTitle())
+                .setSubtitle(streamHistoryEntry.getStreamEntity().getUploader())
                 .setIconUri(Uri.parse(streamHistoryEntry.getStreamEntity().getThumbnailUrl()));
 
         return new MediaItem(builder.build(), MediaItem.FLAG_PLAYABLE);