Use tasks for GrVkGpuTextureCommandBuffer.

We will also need transfers there.

Bug: skia:8962
Change-Id: I80d16e1f65d825c7cea99664215cc511efdbdaff
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/210060
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2 files changed