Created a new WindowSurface/Display for MacOS/Vulkan, along with some
GN changes to get it working.

Bug: 1015454
Change-Id: I3f7a12f173795efe598856c702ce53b1e50831eb
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1880163
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>