Fix @VisibleForTesting in CompositorAnimator

Some functions are called outside of testing code despite of being
marked with @VisibleForTesting.

This CL stops calling the following methods:
- #setValues(float, float)
- #getAnimatedFraction()

Removed @VisibleForTesting for #getAnimatedValue() since there's no
other way for non-property animations.

Removed @VisibleForTesting for #setValues to match ValueAnimator.

Bug: None
Change-Id: I7483b47054fa0c0df62964873046de0b420756f6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1621348
Reviewed-by: Donn Denman <donnd@chromium.org>
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661975}
4 files changed