Improved code format (final) and added isCommentsDisabled method

Author: litetex

extractor/src/main/java/org/schabi/newpipe/extractor/comments/CommentsExtractor.java

@@ -9,9 +9,12 @@
 
 public abstract class CommentsExtractor extends ListExtractor<CommentsInfoItem> {
 
-    public CommentsExtractor(StreamingService service, ListLinkHandler uiHandler) {
+    public CommentsExtractor(final StreamingService service, final ListLinkHandler uiHandler) {
         super(service, uiHandler);
-        // TODO Auto-generated constructor stub
+    }
+
+    public boolean isCommentsDisabled() {
+        return false;
     }
 
     @Nonnull