Settings: Forward port CM Screen Security settings (Part 1 of 2)

includes:
- Menu Unlock, Quick Unlock, Home unlock and Slide lock delay settings
  Author: DvTonder

- Lockscreen cleanup: Rework the logic to separate cm lockscreen
  settings from stock lockscreen settings.
  Author: Danesh M
  Id: Ic3eebc30fbb55afa6254889b17bde6e3083d1847

- Fix unknown sources crash
  Modify logic to only make cmsecurity specify the extra,
  any other time, default to stock security
  Author: Danesh M
  Id: Ida4b8ccc2f41d79aa9013029b4245ae4d3cd4496

- Adjust available options based on screen lock picked
  Disable / enable the available screen security aditional options based
  on what screen lock was picked.
  Author: jfassad
  Id: I634b18b58d0e1a1c075f9808776fc4f685316221

- Add home button unlock option
  Author: invisiblek
  Id: I10b96b2f788ca26bc45f1758e612b9dfe7beff59

Change-Id: I0dda524830d8dce571910eb1fbd66d5b5af11bff

Conflicts:
	res/values/strings.xml