Add url to ReCaptchaException

Sometimes YouTube introduces recaptchas only on some pages. By adding an url to the ReCaptchaException the NewPipe app is able to use that url to load the page that originally caused the problem.
Also removed every instance of exception caught and rethrown with a different description: it makes no sense and it removes part of the useful stacktrace.

extractor/src/test/java/org/schabi/newpipe/Downloader.java

@@ -129,7 +129,7 @@ public class Downloader implements org.schabi.newpipe.extractor.Downloader {
              * request See : https://github.com/rg3/youtube-dl/issues/5138
              */
             if (con.getResponseCode() == 429) {
-                throw new ReCaptchaException("reCaptcha Challenge requested");
+                throw new ReCaptchaException("reCaptcha Challenge requested", con.getURL().toString());
             }
 
             throw new IOException(con.getResponseCode() + " " + con.getResponseMessage(), e);