Place the realm & scope values in ""

- On Android, the lack of "" caused the Java to throw exceptions when
trying to read the response code (Android assumes that when we have a
response code like 401 we have the WWW-Authenticate header set) ... also
... it seems that Android is very particlular about the ""
- Most examples from the specs have the values of realm in "" i.e.
- - http://tools.ietf.org/html/rfc2617#section-3.5
- - http://tools.ietf.org/html/draft-ietf-oauth-v2-10#section-5.2