Initial implementation of WorkletAnimationEffect

Includes read only .getTiming() function for use on animation worklet
threads. Renamed old proxy files to match new structure.

    WorkletGroupEffectProxy -> WorkletGroupEffect
    EffectProxy             -> WorkletAnimationEffect

Design Doc:

Bug: 915344
Change-Id: Ib43d7225d47d145a8d1364472373a514407d5d3f
Reviewed-by: Robert Flack <>
Reviewed-by: Majid Valipour <>
Reviewed-by: Jeremy Roman <>
Reviewed-by: Yi Gu <>
Commit-Queue: Jordan Taylor <>
Cr-Commit-Position: refs/heads/master@{#661400}
42 files changed