Add Device Settings

*Only option right now it to disable harware keys.

Change-Id: Idfcbfd4cc1c380b077325bd8c96da5a33237abd5

Conflicts:
	DeviceSettings/Android.mk
	DeviceSettings/AndroidManifest.xml
	DeviceSettings/res/values/strings.xml
	DeviceSettings/src/com/cyanogenmod/settings/device/DeviceSettings.java
	DeviceSettings/src/com/cyanogenmod/settings/device/Startup.java
	DeviceSettings/src/com/cyanogenmod/settings/device/Utils.java