The Android vulkan code is reusable, so move that to a new file
SystemInfo_vulkan.cpp and call it in the Android & Fuchsia
implementations. This is necessary to skip tests based on GPU.

Bug: angleproject:4349, angleproject:4352
Change-Id: I8330cfcdbd41f4d51391bd5ed7f0820c55e02801
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2023909
Commit-Queue: Michael Spang <spang@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>