[MediaCCC] Fix lambda link handler keeping reference to extractor

This caused problems in NewPipe, because extractors are not serializable, and well, keeping references to them is a bad idea anyway.

Author: Stypox

extractor/src/main/java/org/schabi/newpipe/extractor/services/media_ccc/extractors/MediaCCCConferenceExtractor.java

@@ -95,9 +95,11 @@ public boolean isVerified() {
     @Nonnull
     @Override
     public List<ListLinkHandler> getTabs() throws ParsingException {
+        // avoid keeping a reference to MediaCCCConferenceExtractor inside the lambda
+        final JsonObject theConferenceData = conferenceData;
         return List.of(new ReadyChannelTabListLinkHandler(getUrl(), getId(), ChannelTabs.VIDEOS,
                 (service, linkHandler) ->
-                        new MediaCCCChannelTabExtractor(service, linkHandler, conferenceData)));
+                        new MediaCCCChannelTabExtractor(service, linkHandler, theConferenceData)));
     }
 
     @Override