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

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

Change-Id: I9a43e611911f2e278605715f714860ad11236fd9
Revert "Settings: Add xxhdpi profile icon"

This reverts commit 0051bdaa789d29033b3b8997e7b1a4a3dcc406dd.