CPU Settings: add ability to enable/disable ROM preferences
Users can now choose if they want to control the CPU settings
listed below natively or with a 3rd party app.

- CPU governor
- CPU minimum frequency
- CPU maximum frequency
- I/O scheduler for main block device

Conflicts:
	res/values/strings.xml

 Author:    Mike Wielgosz <dev.mwielgosz@gmail.com>
 Changes to be committed:

	modified:   res/values/strings.xml
	modified:   res/xml/cpu_settings.xml
	modified:   src/com/android/settings/CPUSettings.java
	modified:   src/com/android/settings/OnBootCompleted.java