Add JavaDoc for MAX_EMPTY_PAGES

Author: that1potato

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/extractors/SoundcloudChannelTabExtractor.java

@@ -24,7 +24,8 @@ public class SoundcloudChannelTabExtractor extends ChannelTabExtractor {
 
     private static final String USERS_ENDPOINT = SOUNDCLOUD_API_V2_URL + "users/";
 
-    private static final int MAX_EMPTY_PAGES = 5;
+    // Empty page cap against infinite pagination loops. 
+    private static final int MAX_EMPTY_PAGES = 5; 
 
     private final String userId;