add Device Settings for DT2W
this also reverts http://gerrit.aicp-rom.com/#/c/2433/

this was ported from DU's Device settings for the M8
was modified a bit but authorship goes to jmztaylor

ps2: add build barrier and edit commit message

Change-Id: Icc24cc4e0814758e5ac2ab14f2e5aa6d46dcd84d