Consider two panel in home to overview transition

- Get the value from DeviceProfile directly

Fix: 202444558
Test: manual
Change-Id: Ifadbbf34c8103d7275b8b4043dcae47d1168ae83

src/com/android/launcher3/DeviceProfile.java

@@ -813,15 +813,23 @@ public class DeviceProfile {
         Point padding = getTotalWorkspacePadding();
 
         int numColumns = isTwoPanels ? inv.numColumns * 2 : inv.numColumns;
-        int cellLayoutTotalPadding =
-                isTwoPanels ? 4 * cellLayoutPaddingLeftRightPx : 2 * cellLayoutPaddingLeftRightPx;
-        int screenWidthPx = availableWidthPx - padding.x - cellLayoutTotalPadding;
+        int screenWidthPx = getWorkspaceWidth(padding);
         result.x = calculateCellWidth(screenWidthPx, cellLayoutBorderSpacePx.x, numColumns);
         result.y = calculateCellHeight(availableHeightPx - padding.y
                 - cellLayoutBottomPaddingPx, cellLayoutBorderSpacePx.y, inv.numRows);
         return result;
     }
 
+    public int getWorkspaceWidth() {
+        return getWorkspaceWidth(getTotalWorkspacePadding());
+    }
+
+    public int getWorkspaceWidth(Point workspacePadding) {
+        int cellLayoutTotalPadding =
+                isTwoPanels ? 4 * cellLayoutPaddingLeftRightPx : 2 * cellLayoutPaddingLeftRightPx;
+        return availableWidthPx - workspacePadding.x - cellLayoutTotalPadding;
+    }
+
     public Point getTotalWorkspacePadding() {
         updateWorkspacePadding();
         return new Point(workspacePadding.left + workspacePadding.right,