Signal-Android/app/src/main/res/animator/reactions_scrubber_hide.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <objectAnimator
        android:duration="@integer/reaction_scrubber_hide_duration"
        android:interpolator="@android:anim/decelerate_interpolator"
        android:propertyName="translationY"
        android:valueTo="@dimen/reaction_scrubber_anim_start_translation_y"
        android:valueFrom="@dimen/reaction_scrubber_anim_end_translation_y" />

    <objectAnimator
        android:duration="@integer/reaction_scrubber_hide_duration"
        android:interpolator="@android:anim/decelerate_interpolator"
        android:propertyName="alpha"
        android:valueTo="0"
        android:valueFrom="1" />
</set>