Make Vulkan vertex and index buffers support transfer dst

Bug: skia:12720

Change-Id: I34865b966a84a329960c87b5d862186fe5e1af55
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/551839
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed