Vulkan: Avoid swapchain recreation on present mode change Bug: angleproject:7878 Change-Id: I5a36c206dc8feb640fc684f92c10c26628633601 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4088907 Reviewed-by: Ian Elliott <ianelliott@google.com> Reviewed-by: Charlie Lao <cclao@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jeff Vigil <j.vigil@samsung.com>