Add a simple chroot jail wrapper for rild

Sandboxing the rild forecloses the possibility of remote access to files
on the phone through the cellular baseband, as described in
http://redmine.replicant.us/projects/replicant/wiki/SamsungGalaxyBackdoor
.

Change-Id: Iad069678097859153c1b7c56ab57e1c9efdb550d
Signed-off-by: Dan Trifan <jimsth@gmail.com>
maguro: disable mobile plan management in settings

This is basically useless on phones at the moment.

Change-Id: I912bc342f117582c78d763b94665f49f6fc17302
Signed-off-by: Dan Trifan <jimsth@gmail.com>
Revert "maguro: disable mobile plan management in settings"

This reverts commit c5edcde1a9debeec9fd9c9ec7e37ac4d3ce1e732.
Revert "Add a simple chroot jail wrapper for rild"

This reverts commit f5861bb206fa61828d9bc8dca1927cdc57bec63d.