AOKP custom system animations (1/2)

- Work by AOKP team and ported by @cristianomatos @crdroidandroid

Conflicts:
	core/java/android/provider/Settings.java
	core/res/res/values/cr_strings.xml
	core/res/res/values/cr_symbols.xml
AOKP animations: Add an entry for TRANSIT_TASK_OPEN_BEHIND [1/2]