PowerMenu: Security Feature (Toggle) to Hide Reboot (reboot recovery) 1/2

Commit originally made to Rom Control, but PAC uses a different Power Menu preference screen through the normal system settings app.

This commit implements the preferences required for the Power Menu security feature within the PAC power menu and does not restore the deleted power menu from Rom Control.

Seemed logical to move this to the PAC Power Menu instead of having another Power Menu in Rom Control with this single option.

Change-Id: Iaebcc7383b6dd44e108a952d62295f3c9edb0f11