Summary:
Efl.Player interface simply provides play functions,
but another interface which indicates Efl.Player will play is also
needed.
Test Plan: Run elementary_test->Efl.Animation tests
Reviewers: woohyun, conr2d, Jaehyun_Cho, jpeg, cedric
Differential Revision: https://phab.enlightenment.org/D5662
Efl.Animation.Object is a class which starts or cancels animation.
Efl.Animation.Object instance is created by Efl.Animation instance.
So Efl.Animation.Object instance contains animation properties from
Efl.animation instance.
Animation properties are set by using Efl.Animation instance and the
animation is started or cancelled by using Efl.Animation.Object.