Use boundsOnScreen to offset the translate

ScreenRect is position in current window. However, it results in the
incorrect bounds if the window isn't from (0, 0). We need to update
it with bounds on screen instead.

Bug: 149539748
Test: a11y CTS & unit tests
Change-Id: I3cb07656a2c87e5f4fd1cba78463b1135c959bd4