Revert "Revert "settings: Add xxhdpi profile icon""

This reverts commit a97c4b862d5331df2252df50df9931a8574650c0.

Change-Id: I23473bf86dec09bf4d4a26287f911f25f5c21668
Merge "Revert "Revert "settings: Add xxhdpi profile icon""" into cm-11.0
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
Merge remote-tracking branch 'upstream/cm-11.0' into HEAD