no hardware keys, so turn off the hardware key settings

Change-Id: Ifbce5194edcdcb0604b302f9a070e6ddfb28cd04
Revert "overlay: Set config_deviceHardwareKeys properly"

This reverts commit 3058323d7ffb26d1cec615f7f30d24b54ffa1fb0.
Merge remote-tracking branch 'cm/cm-10.2' into cm-10.2
Merge remote-tracking branch 'origin/cm-10.2' into cm-10.2