tree 326bec69119f7bea910b9d6ba196d0e8e9120df6
parent 6578ad5bb493d43ae6a1f8a0b0d6dd180aa90b50
author Doris Liu <tianliu@google.com> 1439575868 -0700
committer Doris Liu <tianliu@google.com> 1440637504 -0700

Internal cleanup for Animator framework

This CL includes the following changes:
1) Remove redundant field mPlayingState in ValueAnimator.
2) Refactor AnimationHandler so that all of its interaction with Choreographer
   is through an interface. A custom provider that implements this interface can
   be plugged in and provide timing pulse that are independent of Choreographer.
3) Better encapsulate AnimationHandler and ValueAnimator. Interaction between
   the two is done through register/unregister frame callbacks as well as
   AnimationFrameCallback interface.
4) Change how animation delay is handled.

Change-Id: Icd49f727321c362dab49b5b33815333c9ea559e0