settings: Enable location mode header switch

Change-Id: I347e769351bc15daa87d3b6d684afe4e80416ecc
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
(cherry picked from commit 937a0b86944097dcc5f935c7dc354034f7f65e7a)
Only show ART information if switching from dalvik to ART

We do not want to confuse users with a big information dialog, if
they change from ART to dalvik as dalvik is still the official
solution, supported and considered safe.

Change-Id: I0ce4846e0bb751e87e5c410e668d4bc521380141

Patchset: 2
https://gerrit.omnirom.org/#/c/3698/
(cherry picked from commit b2de2b7254dd88b8053e80355d71de6e9ed9e6d3)