Fix One Handed Feedback gesture's animations are quite jarring

    <integer name="long_press_dock_anim_duration">250</integer>

    <!-- Animation duration for translating of one handed when trigger / dismiss. -->

    <integer name="config_one_handed_translate_animation_duration">300</integer>

    <integer name="config_one_handed_translate_animation_duration">800</integer>

    <!-- One handed mode default offset % of display size -->

    <fraction name="config_one_handed_offset">40%</fraction>

import android.content.Context;

import android.graphics.Rect;

import android.view.SurfaceControl;

import android.view.animation.Interpolator;

import android.view.animation.OvershootInterpolator;

import android.view.animation.BaseInterpolator;

import android.window.WindowContainerToken;

import androidx.annotation.VisibleForTesting;

    public @interface TransitionDirection {

    }

    private final Interpolator mOvershootInterpolator;

    private final OneHandedInterpolator mInterpolator;

    private final OneHandedSurfaceTransactionHelper mSurfaceTransactionHelper;

    private final HashMap<WindowContainerToken, OneHandedTransitionAnimator> mAnimatorMap =

            new HashMap<>();

     */

    public OneHandedAnimationController(Context context) {

        mSurfaceTransactionHelper = new OneHandedSurfaceTransactionHelper(context);

        mOvershootInterpolator = new OvershootInterpolator();

        mInterpolator = new OneHandedInterpolator();

    }

    @SuppressWarnings("unchecked")

    OneHandedTransitionAnimator setupOneHandedTransitionAnimator(

            OneHandedTransitionAnimator animator) {

        animator.setSurfaceTransactionHelper(mSurfaceTransactionHelper);

        animator.setInterpolator(mOvershootInterpolator);

        animator.setInterpolator(mInterpolator);

        animator.setFloatValues(FRACTION_START, FRACTION_END);

        return animator;

    }

     *

     * @param <T> Type of property to animate, either offset (float)

     */

    // TODO: Refactoring to use SpringAnimation and DynamicAnimation instead of using ValueAnimator

    //  to implement One-Handed transition animation. (b/185129031)

    public abstract static class OneHandedTransitionAnimator<T> extends ValueAnimator implements

            ValueAnimator.AnimatorUpdateListener,

            ValueAnimator.AnimatorListener {

            };

        }

    }

    /**

     * An Interpolator for One-Handed transition animation.

     */

    public class OneHandedInterpolator extends BaseInterpolator {

        @Override

        public float getInterpolation(float input) {

            return (float) (Math.pow(2, -10 * input) * Math.sin(((input - 4.0f) / 4.0f)

                    * (2.0f * Math.PI) / 4.0f) + 1);

        }

    }

}