Fix bandcamp radio stream extractor

Author: fynngodau

extractor/src/main/java/org/schabi/newpipe/extractor/services/bandcamp/extractors/BandcampRadioStreamExtractor.java

@@ -14,6 +14,7 @@
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
 import org.schabi.newpipe.extractor.linkhandler.LinkHandler;
+import org.schabi.newpipe.extractor.playlist.PlaylistInfoItemsCollector;
 import org.schabi.newpipe.extractor.stream.AudioStream;
 import org.schabi.newpipe.extractor.stream.Description;
 import org.schabi.newpipe.extractor.stream.StreamSegment;
@@ -165,4 +166,10 @@ public List<String> getTags() {
     public Privacy getPrivacy() {
         return Privacy.PUBLIC;
     }
+
+    @Override
+    public PlaylistInfoItemsCollector getRelatedItems() {
+        // Contrary to other Bandcamp streams, radio streams don't have related items
+        return null;
+    }
 }