Fix search queries with a promotedSparklesTextSearchRenderer returning 0 results

Author: wb9688

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSearchExtractor.java

@@ -101,11 +101,13 @@ public String getSearchSuggestion() {
     @Override
     public InfoItemsPage<InfoItem> getInitialPage() throws ExtractionException {
         InfoItemsSearchCollector collector = getInfoItemSearchCollector();
-        JsonArray videos = initialData.getObject("contents").getObject("twoColumnSearchResultsRenderer")
-                .getObject("primaryContents").getObject("sectionListRenderer").getArray("contents")
-                .getObject(0).getObject("itemSectionRenderer").getArray("contents");
+        JsonArray sections = initialData.getObject("contents").getObject("twoColumnSearchResultsRenderer")
+                .getObject("primaryContents").getObject("sectionListRenderer").getArray("contents");
+
+        for (Object section : sections) {
+            collectStreamsFrom(collector, ((JsonObject) section).getObject("itemSectionRenderer").getArray("contents"));
+        }
 
-        collectStreamsFrom(collector, videos);
         return new InfoItemsPage<>(collector, getNextPageUrl());
     }