fix search country for next page

Author: theScrabi

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

@@ -79,7 +79,7 @@ public InfoItemsPage<InfoItem> getInitialPage() throws ExtractionException {
 
     @Override
     public String getNextPageUrl() throws ExtractionException {
-        return getUrl() + "&page=" + 2;
+        return getUrl() + "&page=" + 2 + "&gl=" + getLocalization().getCountry();
     }
 
     @Override

extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/search/YoutubeSearchExtractorChannelOnlyTest.java

@@ -45,12 +45,12 @@ public void testGetSecondPage() throws Exception {
         }
         assertFalse("First and second page are equal", equals);
 
-        assertEquals("https://www.youtube.com/results?q=pewdiepie&sp=EgIQAlAU&page=3", secondPage.getNextPageUrl());
+        assertEquals("https://www.youtube.com/results?q=pewdiepie&sp=EgIQAlAU&page=3&gl=GB", secondPage.getNextPageUrl());
     }
 
     @Test
     public void testGetSecondPageUrl() throws Exception {
-        assertEquals("https://www.youtube.com/results?q=pewdiepie&sp=EgIQAlAU&page=2", extractor.getNextPageUrl());
+        assertEquals("https://www.youtube.com/results?q=pewdiepie&sp=EgIQAlAU&page=2&gl=GB", extractor.getNextPageUrl());
     }
 
     @Test

extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/search/YoutubeSearchExtractorDefaultTest.java

@@ -53,7 +53,7 @@ public static void setUpClass() throws Exception {
 
     @Test
     public void testGetSecondPageUrl() throws Exception {
-        assertEquals("https://www.youtube.com/results?q=pewdiepie&page=2", extractor.getNextPageUrl());
+        assertEquals("https://www.youtube.com/results?q=pewdiepie&page=2&gl=GB", extractor.getNextPageUrl());
     }
 
     @Test
@@ -96,7 +96,7 @@ public void testGetSecondPage() throws Exception {
         }
         assertFalse("First and second page are equal", equals);
 
-        assertEquals("https://www.youtube.com/results?q=pewdiepie&page=3", secondPage.getNextPageUrl());
+        assertEquals("https://www.youtube.com/results?q=pewdiepie&page=3&gl=GB", secondPage.getNextPageUrl());
     }
 
     @Test