Disk Encryption: Enable user file system encryption

Disk Encryption: Enable user file system encryption

BZ: 20830

Include the device-mapper in the kernel configuration o
Include crypto SHA256 and CBC in the kernel configuraiton.

Change-Id: Ic75bbe96ebf8ddbb4799119eb69aa3a1bea590bd
Signed-off-by: Norvin Shuster <Norvin.Shuster@intel.com>
Reviewed-on: http://android.intel.com:8080/32762
Reviewed-by: Allyn, Mark A <mark.a.allyn@intel.com>
Reviewed-by: Shuster, Norvin <norvin.shuster@intel.com>
Reviewed-by: Yang, Fei <fei.yang@intel.com>
Reviewed-by: Gross, Mark <mark.gross@intel.com>
Reviewed-by: Mangalampalli, Jayant <jayant.mangalampalli@intel.com>
Tested-by: Mangalampalli, Jayant <jayant.mangalampalli@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>