AOKP custom system animations (2/2)

Work by AOKP team and some minor string, code formats and switch instead of checkbox by @cristianomatos @crdroidandroid

Conflicts:
	res/values/cr_strings.xml
	res/xml/animation_settings.xml
AOKP animations: Add and entry for TRANSIT_TASK_OPEN_BEHIND [2/2]

Conflicts:
	res/values/cr_strings.xml