Vulkan: Only call checkCompletedCommands if needed. SyncHelper::getStatus() is always calling checkCompletedCommands. This CL makes it only call RendererVk::checkCompletedCommands if sync is not finished. If it is already finished, we could just immediate return "signaled". Bug: b/266220198 Change-Id: Ie7be9ea9c07d40984945ae3f20a5276c10b3322d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4195834 Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com> Commit-Queue: Charlie Lao <cclao@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>