Default ItemAnimators don't use interpolator from constructor

[ggolyakov]

For example
FadeInAnimator

`  override fun animateRemoveImpl(holder: RecyclerView.ViewHolder) {
    holder.itemView.animate().apply {
      alpha(0f)
      duration = removeDuration
      interpolator = interpolator
      setListener(DefaultRemoveAnimatorListener(holder))
      startDelay = getRemoveDelay(holder)
    }.start()
  }`

The code interpolator = interpolator is similar to ViewPropertyAnimator.setInterpolator(ViewPropertyAnimator.getInterpolator())

To fix, you need to use interpolator = this@FadeInAnimator.interpolator

Library version : 4.0.2