ageRestrictedContent cookie only sent for youtube

Now the age restricted content cookie is only sent when sending a
request to youtube. There's no need to remove the cookie when the
service changes because whether to add the cookie is determined by
looking at the url the request is being sent to.

app/src/main/java/org/schabi/newpipe/settings/ContentSettingsFragment.java

@@ -92,7 +92,7 @@ public class ContentSettingsFragment extends BasePreferenceFragment {
 
         if (preference.getKey().equals(showAgeRestrictedContentKey)) {
             Context context = getContext();
-            if(context != null){
+            if (context != null) {
                 DownloaderImpl.getInstance().updateAgeRestrictedContentCookies(context);
             }
         }