Correct landscape mode color extraction rectangle

I had inverted the width and height of the screen,

Bug: 185887938
Test: Manual
Change-Id: I03889bf5e3f257414b90e992583307d61a960fe6
diff --git a/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java b/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java
index 0d53f20..f77c740 100644
--- a/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java
+++ b/src/com/android/launcher3/widget/LauncherAppWidgetHostView.java
@@ -339,7 +339,7 @@
         // The layout depends on the orientation.
         if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
             int parentViewWidth = parentView == null ? 0 : parentView.getWidth();
-            xOffset = screenHeight - mWorkspace.getPaddingRight() - parentViewWidth;
+            xOffset = screenWidth - mWorkspace.getPaddingRight() - parentViewWidth;
         } else {
             int parentViewPaddingLeft = parentView == null ? 0 : parentView.getPaddingLeft();
             xOffset = mWorkspace.getPaddingLeft() + parentViewPaddingLeft;