Vulkan: Decouple RendererVk from EGL attributes The attributes are now processed in DisplayVk and the results are passed to RendererVk. Bug: angleproject:8564 Change-Id: Iac8add7953d3f88e19942a21dcdfbedf3b672f52 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5331607 Reviewed-by: Yuxin Hu <yuxinhu@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>