TouchInputMapper: Remove the concept of "surface"

Prior to switching the input pipeline to work in display space,
TouchInputMapper used the concept of "surface coordinates" to refer to
the post-transformed logical display coordinate space. Information about
the logical display was obtained from the DisplayViewport.

Now that transformation to various coordinate spaces are handled within
MotionEvent through various ui::Transforms, we can retire the use of
logical display space from TouchInputMapper.

Bug: 188939842
Test: presubmit
Change-Id: I850acd07ac9aa0bbd344d8946b57204261c30e8b