Split view::Surface out of Surface.cpp

it’s moved into a new view/Surface.cpp, header in
gui/view/Surface.h

their entanglement also meant that code that needs
only view::Surface ended up with all of Surface
dependencies.

Test: built and booted device
Bug: treble
Change-Id: I1a350d258f124fbe0a7bc5a2ca165311dcb0d8e3