Encryption code added

MOBILE-1294, 1301, 1273, 1272, 1249, 1209 addressed (further integration required).

1. Added detection of paid account during account loading
2. Re-enabled links in Prefs and pointed to official sites.
3. Added Data Protection prompt when paid account is logged into.
4. Added encryption and unencryption during ActionManager actions.
5. Added encryption and unencryption for emailutils.
6. Full encryption/unencryption working for Data Protection setting.