Use Collections.emptyList() instead of Collections.EMPTY_LIST or new ArrayList()

Author: TobiGr

extractor/src/main/java/org/schabi/newpipe/extractor/linkhandler/ListLinkHandlerFactory.java

@@ -4,6 +4,7 @@
 import org.schabi.newpipe.extractor.utils.Utils;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 public abstract class ListLinkHandlerFactory extends LinkHandlerFactory {
@@ -13,7 +14,7 @@ public abstract class ListLinkHandlerFactory extends LinkHandlerFactory {
     ///////////////////////////////////
 
     public List<String> getContentFilter(String url) throws ParsingException {
-        return new ArrayList<>(0);
+        return Collections.emptyList();
     }
 
     public String getSortFilter(String url) throws ParsingException {

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

@@ -20,6 +20,7 @@
 import javax.annotation.Nullable;
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import static org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampExtractorHelper.getImageUrl;
@@ -137,6 +138,6 @@ public String getCategory() {
     @Nonnull
     @Override
     public List<String> getTags() {
-        return new ArrayList<>();
+        return Collections.emptyList();
     }
 }

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

@@ -211,24 +211,24 @@ public List<AudioStream> getAudioStreams() {
 
     @Override
     public List<VideoStream> getVideoStreams() {
-        return Collections.EMPTY_LIST;
+        return Collections.emptyList();
     }
 
     @Override
     public List<VideoStream> getVideoOnlyStreams() {
-        return Collections.EMPTY_LIST;
+        return Collections.emptyList();
     }
 
     @Nonnull
     @Override
     public List<SubtitlesStream> getSubtitlesDefault() {
-        return new ArrayList<>();
+        return Collections.emptyList();
     }
 
     @Nonnull
     @Override
     public List<SubtitlesStream> getSubtitles(MediaFormat format) {
-        return new ArrayList<>();
+        return Collections.emptyList();
     }
 
     @Override

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

@@ -15,6 +15,7 @@
 import java.io.IOException;
 import java.net.URLEncoder;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 public class BandcampSuggestionExtractor extends SuggestionExtractor {
@@ -48,7 +49,7 @@ public List<String> suggestionList(final String query) throws IOException, Extra
         } catch (final JsonParserException e) {
             e.printStackTrace();
 
-            return new ArrayList<>();
+            return Collections.emptyList();
         }