Revert^2 "Move Animation Lib content to new "core" subpackage."

This reverts commit efda9c79cdadce407ef16521b1a27d0049cf7687.

Reason for revert: Solved the issue in the other CL in the topic

Change-Id: I6a61dd0624be76a838c15e505e2cedb551129f75
49 files changed