In Vulkan don't submit CB after resolve call unless we are preparing image for I/O

Bug: skia:
Change-Id: I99c1d2ee1300f1f1757f7c44b3a839aba3091fee
Reviewed-on: https://skia-review.googlesource.com/c/175259
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
4 files changed