searchfilters: Make SoundcloudSearchQueryHandlerFactory singleton

Author: evermind-zz

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudService.java

@@ -50,7 +50,7 @@ public String getBaseUrl() {
 
     @Override
     public SearchQueryHandlerFactory getSearchQHFactory() {
-        return new SoundcloudSearchQueryHandlerFactory();
+        return SoundcloudSearchQueryHandlerFactory.getInstance();
     }
 
     @Override

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/linkHandler/SoundcloudSearchQueryHandlerFactory.java

@@ -20,9 +20,17 @@
 public class SoundcloudSearchQueryHandlerFactory extends SearchQueryHandlerFactory {
 
     public static final int ITEMS_PER_PAGE = 10;
+    private static SoundcloudSearchQueryHandlerFactory instance = null;
 
     private final SoundcloudFilters searchFilters = new SoundcloudFilters();
 
+    public static synchronized SoundcloudSearchQueryHandlerFactory getInstance() {
+        if (instance == null) {
+            instance = new SoundcloudSearchQueryHandlerFactory();
+        }
+        return instance;
+    }
+
     @Override
     public String getUrl(final String id,
                          final List<FilterItem> selectedContentFilter,