Folder cell should match grid cell aspect ratio if isScalableGrid is true.

Bug: 175329686
Test: inspected with go/web-hv
Change-Id: I652c696d8ae58b7009b7310bb926b279b9477724
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 9df8d44..de11eae 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -213,7 +213,10 @@
         mActivity = ActivityContext.lookupContext(context);
         DeviceProfile deviceProfile = mActivity.getDeviceProfile();
 
-        mBorderSpacing = deviceProfile.cellLayoutBorderSpacingPx;
+        mBorderSpacing = mContainerType == FOLDER
+                ? deviceProfile.folderCellLayoutBorderSpacingPx
+                : deviceProfile.cellLayoutBorderSpacingPx;
+
         mCellWidth = mCellHeight = -1;
         mFixedCellWidth = mFixedCellHeight = -1;