Work around RenderDoc bug in Vk device enumeration
Work around RenderDoc bug in Vk device enumeration

This makes it possible to run Vulkan viewer inside RenderDoc on machines
with more than one physical device.

Change-Id: Ifaea9af74609ce712513a3f9c7aa9cc0e8b9d39b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/599656
Auto-Submit: Brian Osman <794c0b5534edf5601d88e1d41975d0262da12894@google.com>
Commit-Queue: Greg Daniel <39df0a804564ccb6cf75f18db79653821f37c1c5@google.com>
Reviewed-by: Greg Daniel <39df0a804564ccb6cf75f18db79653821f37c1c5@google.com>

google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia