frameworks: Custom System Animations

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 Insta Open
Window Insta Close

Duration Controls

Prevent overridePendingTransition option

Change-Id: Id360abe158d36ab85c1c0d0103428d4a8867e70c
Merge branch 'jb-mr2' of https://github.com/AOKP/frameworks_base into linaro2