Fix widget cell container size

This was the same calculation used before http://ag/15177218.

Test: run AddWidgetTest, AddConfigWidgetTest
Bug: 193819550
Change-Id: I1b5e0072a4c05b656de98f8d42667ae99438c005
diff --git a/src/com/android/launcher3/widget/WidgetCell.java b/src/com/android/launcher3/widget/WidgetCell.java
index 0c9a15a..d3f4528 100644
--- a/src/com/android/launcher3/widget/WidgetCell.java
+++ b/src/com/android/launcher3/widget/WidgetCell.java
@@ -332,8 +332,8 @@
                 scale = Math.min(maxWidth / previewWidth, 1);
             }
             setContainerSize(
-                    Math.round(drawable.getIntrinsicWidth() * scale),
-                    Math.round(drawable.getIntrinsicHeight() * scale));
+                    Math.round(drawable.getIntrinsicWidth() * scale * mPreviewContainerScale),
+                    Math.round(drawable.getIntrinsicHeight() * scale * mPreviewContainerScale));
             mWidgetImage.setDrawable(drawable);
             mWidgetImage.setVisibility(View.VISIBLE);
             if (mAppWidgetHostViewPreview != null) {