layers: Add binding for framebuffer children

layers: Add binding for framebuffer children

When BeginCommandBuffer and CmdBeginRenderPass are called, need to bind
not only the framebuffer, but all of the framebuffer's children objects
to the command buffer.
This includes the imageViews that are in the attachments as well as their
children and the renderpass.
Added this binding and included IMAGE_VIEW_STATE* in framebuffer
attachment struct for simplicity when creating binding.