Fix for amd copy as draws on vulkan

Our copies as draws have the same bug on amd as normal bugs where we need
to start a new command buffer before binding a pipeline to it.

Bug: skia:
Change-Id: If9cade2e069bf09758c5328bf606c9bd5b5aab9c
Reviewed-on: https://skia-review.googlesource.com/17213
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
4 files changed