[ChromeDriver] Update testSetsThePositionOfTheCurrentWindow Java test

WindowTest.testSetsThePositionOfTheCurrentWindow Java test is flaky
on Mac platform. Depending on what was the window current position
while previous test was run, it may happen window current position
become out of screen.
With this CL we are increasing window current position by 30
points to bring back application window into the screen area.

Change-Id: Id050a8fc7ef697572372a1b167756eb353416c83
2 files changed