Add the 'privilege' parameter to popup response callback

Add the 'privilege' parameter to popup response callback

Apart from that, a protection against sending multiple requests
with the same privilege has been added. A new status code:
PRIVACY_PRIVILEGE_MANAGER_ERROR_ALREADY_IN_PROGRESS informs
an application when the above error occurs.

Change-Id: Ifb2397c99452d56f7327f0be3f54ce33b766488f