Enable VVL on vulkan instance created in GetSystemInfoVulkanWithICD This helps catching bugs for vulkan calls issued during GetSystemInfoVulkanWithICD(). Also changed getProc() function to get vulkan function pointers by calling vkGetInstanceProcAddr(), instead of calling dlsym(). Only use dlsym() to get vkGetInstanceProcAddr() function pointer. Bug: angleproject:407116232 Change-Id: I14dce3453c76a084db63fdb45a3db07b7b4d5294 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6374305 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Charlie Lao <cclao@google.com> Commit-Queue: Yuxin Hu <yuxinhu@google.com>