networks: Add polkit rules for network management
Created by: SunilMohanAdapa
Allow Plinth to manage network connections even when running as 'plinth' user and not root user. This is done by adding polkit rules that Network Manager checks
- Add new style Javascript based rules file for newer versions of polkit (>105). This is not fuly tested.
- Add old style .pkla file for older versions of polkit (<=105).