- No support for formats that do not support vulkan blit.
- The depth/stencil format used in the tests do not support
blit, so currently no tests validate the depth/stencil blits.

Bug: angleproject:2643
Change-Id: I89a0d5b102396d8254fe272681326615bd6800ed
Reviewed-on: https://chromium-review.googlesource.com/1111611Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Luc Ferron <lucferron@chromium.org>