Use DeviceProfile numFolderRows and numFolderColumns

Invariant hold values that are not related to current DP in use. This is a change needed for IDP to hold more values in the future akin to iconSize.

Bug: 309800141
Change-Id: Iefb388a5f6590d7da3452d2c388c02bd5e9d32bb
Flag: N/A
Test: NexusLauncherTests
diff --git a/tests/assets/dumpTests/DeviceProfileDumpTest/tabletLandscape.txt b/tests/assets/dumpTests/DeviceProfileDumpTest/tabletLandscape.txt
index 26b86dc..32e1f1b 100644
--- a/tests/assets/dumpTests/DeviceProfileDumpTest/tabletLandscape.txt
+++ b/tests/assets/dumpTests/DeviceProfileDumpTest/tabletLandscape.txt
@@ -37,8 +37,8 @@
 	iconSizePx: 120.0px (60.0dp)
 	iconTextSizePx: 28.0px (14.0dp)
 	iconDrawablePaddingPx: 9.0px (4.5dp)
-	inv.numFolderRows: 3
-	inv.numFolderColumns: 3
+	numFolderRows: 3
+	numFolderColumns: 3
 	folderCellWidthPx: 240.0px (120.0dp)
 	folderCellHeightPx: 208.0px (104.0dp)
 	folderChildIconSizePx: 120.0px (60.0dp)