Add WallpaperCropperTest

import android.view.DisplayInfo;

import android.view.View;

import com.android.internal.annotations.VisibleForTesting;

import com.android.server.utils.TimingsTraceAndSlog;

import libcore.io.IoUtils;

     * Maximum acceptable parallax.

     * A value of 1 means "the additional width for parallax is at most 100% of the screen width"

     */

    private static final float MAX_PARALLAX = 1f;

    @VisibleForTesting static final float MAX_PARALLAX = 1f;

    /**

     * We define three ways to adjust a crop. These modes are used depending on the situation:

     *   - When going from folded to unfolded, we want to add content

     *   - For a screen rotation, we want to keep the same amount of content

     */

    private static final int ADD = 1;

    private static final int REMOVE = 2;

    private static final int BALANCE = 3;

    @VisibleForTesting static final int ADD = 1;

    @VisibleForTesting static final int REMOVE = 2;

    @VisibleForTesting static final int BALANCE = 3;

    private final WallpaperDisplayHelper mWallpaperDisplayHelper;

     * Given a crop, a displaySize for the orientation of that crop, compute the visible part of the

     * crop. This removes any additional width used for parallax. No-op if displaySize == null.

     */

    private static Rect noParallax(Rect crop, Point displaySize, Point bitmapSize, boolean rtl) {

    @VisibleForTesting

    static Rect noParallax(Rect crop, Point displaySize, Point bitmapSize, boolean rtl) {

        if (displaySize == null) return crop;

        Rect adjustedCrop = getAdjustedCrop(crop, bitmapSize, displaySize, true, rtl, ADD);

        // only keep the visible part (without parallax)

     *     </li>

     * </ul>

     */

    private static Rect getAdjustedCrop(Rect crop, Point bitmapSize, Point screenSize,

    @VisibleForTesting

    static Rect getAdjustedCrop(Rect crop, Point bitmapSize, Point screenSize,

            boolean parallax, boolean rtl, int mode) {

        Rect adjustedCrop = new Rect(crop);

        float cropRatio = ((float) crop.width()) / crop.height();

        float screenRatio = ((float) screenSize.x) / screenSize.y;

        if (cropRatio >= screenRatio) {

        if (cropRatio > screenRatio) {

            if (!parallax) {

                // rotate everything 90 degrees clockwise, compute the result, and rotate back

                int newLeft = bitmapSize.y - crop.bottom;