Forward port button/keyboard backlight options

Change-Id: Ica02fad15392201b719144c4b911407d5b370cee
Settings : date and Time - Checkbox --> Switches

Changes Date & Time Settings from checkboxes to on/off switches, as
recommended: http://developer.android.com/design/building-blocks/switches.html
This also adds some more design consistency.

Change-Id: I1e7848ae46859161f45a3a952e5a8d06ad52a023