Workaround to return 1/3 of the position

Some devices in portrait mode have the same symptoms as b/234322284.
Simply return 1/3 of the position like the X axis to solve the problem.

Bug: 238202110
Test: atest Launcher3Tests:TaplTestsLauncher3#testAddDeleteShortcutOnHotseat
Change-Id: Ic7d3756cfbda6673a62b266c6093745b8311e6ac