Settings: Long Term Orbits (LTO)

Ported from http://review.cyanogenmod.org/#/c/51422/3

Change-Id: Ia1fdf9e0ffa401f64ee9a5c130ed10709d930eb7
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>

Conflicts:
	res/values/cm_strings.xml