[YouTube] Take into account videos that have their views hidden

Also remove catch because it may hide bugs when the page changes.

Author: mauriciocolli

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

@@ -194,11 +194,16 @@ public long getViewCount() throws ParsingException {
             if (videoInfo.getObject("topStandaloneBadge") != null || isPremium()) {
                 return -1;
             }
-            String viewCount = getTextFromObject(videoInfo.getObject("viewCountText"));
+
+            final JsonObject viewCountObject = videoInfo.getObject("viewCountText");
+            if (viewCountObject == null) {
+                // This object is null when a video has its views hidden.
+                return -1;
+            }
+
+            final String viewCount = getTextFromObject(viewCountObject);
 
             return Long.parseLong(Utils.removeNonDigitCharacters(viewCount));
-        } catch (NumberFormatException e) {
-            return -1;
         } catch (Exception e) {
             throw new ParsingException("Could not get view count", e);
         }