[Network Filtering] New API and save

- Remove all WhiteListxxx API
- Add Set() to 'org.freedesktop.DBus.Properties' interface to
  'com.intel.dLeynaRenderer.Manager' root interface
- Add support for 'reload' settings callback

Signed-off-by: Ludovic Ferrandis <ludovic.ferrandis@intel.com>
[Property] Add 'Never Quit' property to Manager

It is now possible to manage the 'Never Quit' option via
the Set() methode.

Signed-off-by: Ludovic Ferrandis <ludovic.ferrandis@intel.com>