Revert "galaxys2: remove DeviceSettings"

This reverts commit 99d12c6a903a3199ba4956add53b82837d90ca9c.
galaxys2: fixing DeviceSettings to use new sysfs node

Change-Id: I587e741df0d0c85a652875c88b3de18eefb9f2c7

Conflicts:

	DeviceSettings/res/values/config.xml
galaxys2: Enable BLE (BT Low Energy) support

Change-Id: I7870beb74e5b1332929d70f29cd717fd5b07255b
overlay: remove some cm stuff