Settings: Custom System Animations ported to MoKee OpenSource. Original work from Steve K. Spear AOKP (2/2)

Allows setting of some system animations.
Current List:
Activity Open
Activity Close
Task Open
Task Close
Task Move to front
Task Move to back
Window Open
Window Close
Window Intra Open
Window Intra Close
Duration Control
Prevent overridePendingTransition option

Change-Id: I525e04c3e5af484fb5a4bea0e4376f3dda4af085