New setting under "Debug settings" that enables the development shortcut

Change-Id: I9a43e611911f2e278605715f714860ad11236fd9

Conflicts:
	res/values/cm_strings.xml
	src/com/android/settings/DevelopmentSettings.java

Conflicts:
	res/values/ok_strings.xml
	src/com/android/settings/DevelopmentSettings.java