android 7.1 默认壁纸拉伸问题

最近编译Android 7.1，编译完后系统中设置的壁纸不能正常显示

修改位置：7.1SDK/packages/apps/WallpaperPicker/src/com/android/wallpaperpicker/WallpaperUtils.java

             // We need to ensure that there is enough extra space in the wallpaper
             // for the intended parallax effects
-            final int defaultWidth, defaultHeight;
+            int defaultWidth, defaultHeight;
             if (res.getConfiguration().smallestScreenWidthDp >= 720) {
                 defaultWidth = (int) (maxDim * wallpaperTravelToScreenWidthRatio(maxDim, minDim));
                 defaultHeight = maxDim;
@@ -145,6 +145,8 @@ public final class WallpaperUtils {
                 defaultWidth = Math.max((int) (minDim * WALLPAPER_SCREENS_SPAN), maxDim);
                 defaultHeight = maxDim;
             }
+            defaultWidth = maxDim;
+            defaultHeight = minDim;
             sDefaultWallpaperSize = new Point(defaultWidth, defaultHeig