Vulkan: Fix swaps done right after a clear. We were missing a dependency insertion between the Framebuffer and its attachments, only during clear operations. Also renames a few methods to make them more consistent. Bug: angleproject:2264 Change-Id: Ic3af5b34b6de900ea2cc1b765f8d3d69f7f9a131 Reviewed-on: https://chromium-review.googlesource.com/891985 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>