code: @Implementation
    protected void search(
        @NonNull final String query, final Bundle extras, @NonNull SearchCallback callback) {
      if (isConnected) {
        final List<MediaItem> searchResults = new ArrayList<>();
        for (MediaItem item : mediaItems.values()) {
          final String mediaTitle = item.getDescription().getTitle().toString().toLowerCase();
          if (mediaTitle.contains(query.toLowerCase())) {
            searchResults.add(item);
          }
        }
        handler.post(() -> callback.onSearchResult(query, extras, searchResults));
      } else {
        handler.post(() -> callback.onError(query, extras));
      }
    }
docs: This differs from real Android search logic. Search results will contain all {@link
  MediaItem}'s with a title that {@param query} is a substring of.