Fix spring-loaded folder animation offset bug

The folder close animation is offset due incorrect scaling in SpringLoaded mode. We fix the folder offset by scaling offsetX() and offsetY() by the scale of the workspace in spring loaded mode (scaleRelativeToDragLayer), and the offset of the preview icons is fixed by dividing previewItemOffsetX by initialScale rather than initialScale / scaleRelativeToDragLayer

Fix: 255420905
Test: manual
Change-Id: I305c1047c14c4c9f1b4c3bd0143e9bb764c71524