Add PrivacyField model field.
Add PrivacyField model field.

justinpotts/mozillians,akatsoulas/mozillians,justinpotts/mozillians,safwanrahman/mozillians,akarki15/mozillians,fxa90id/mozillians,akatsoulas/mozillians,chirilo/mozillians,brian-yang/mozillians,johngian/mozillians,hoosteeno/mozillians,akarki15/mozillians,chirilo/mozillians,ChristineLaMuse/mozillians,akatsoulas/mozillians,johngian/mozillians,ChristineLaMuse/mozillians,johngian/mozillians,mozilla/mozillians,chirilo/mozillians,akarki15/mozillians,anistark/mozillians,mozilla/mozillians,brian-yang/mozillians,justinpotts/mozillians,fxa90id/mozillians,brian-yang/mozillians,akatsoulas/mozillians,hoosteeno/mozillians,anistark/mozillians,safwanrahman/mozillians,akarki15/mozillians,brian-yang/mozillians,anistark/mozillians,fxa90id/mozillians,safwanrahman/mozillians,ChristineLaMuse/mozillians,mozilla/mozillians,chirilo/mozillians,johngian/mozillians,justinpotts/mozillians,safwanrahman/mozillians,hoosteeno/mozillians,fxa90id/mozillians,mozilla/mozillians,hoosteeno/mozillians,anistark/mozillians