Settings: Long Term Orbits (LTO)

Patchset 2: Opt-In LtoService (if device supports LTO) and simplify the code
            Rebased
Patchset 3: Added LocationSettings suggestions
            Rebased

Require http://review.cyanogenmod.org/#/c/51421

Change-Id: I878104eb3c859168faa10467fab3772a2f639288
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>

Conflicts:
	res/values/cm_strings.xml