CL/VK: Fix missing default device on contextFromType Bug: angleproject:377941119 Change-Id: Ia75184233a5b0b422425626cbce46a2105b08249 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6003463 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Austin Annestrand <a.annestrand@samsung.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>