The test IntegrationReorderWidgetsTest was using the oposite dimensions

The order of the columns shold be inversed, it hasn't been much of an
issue because most of the test cases where of equal size 5x5 and 4x4.

Bug: 364711064
Flag: com.android.launcher3.one_grid_specs
Test: IntegrationReorderWidgetsTest
Change-Id: I5de3f63edbb6b446352ce97226e39fb29cdb1439