Adjust launcher opening drag coordinates

Crosshatch has a taller screen than the other Pixel devices, so the
location where the drag was starting was just above what would open the
apps container.

Bug: 87844439
Test: Dialog Dismissal with Walleye, Taimen, B1, and C1
Change-Id: I81c2d98415d8f4f990c990fe4835556fc617d9e7