base

Remove generics from Animator APIs

Change the manner of constructing Animator-related objects from constructors
via generics to factory methods with type-specific method names. Should
improve the proliferation of warnings due to generics issues and make the
code more readable (less irrelevant angle brackets Floating around).

Change-Id: I7c1776b15f3c9f245c09fb7de6dc005fdba58fe2