Add tests for VK_KHR_shared_presentable_image

Add tests for VK_KHR_shared_presentable_image

Initial smoke test for shared image present modes. For each of the new
present modes, exercises a shared image swapchain through a number of
frames, monitoring the status via vkGetSwapchainStatusKHR.

This is not particularly rigorous, but tests if the extension works at
all.

New tests:

dEQP-VK.wsi.*.shared_presentable_image.*

Components: Vulkan

Change-Id: I0e143a2c556ea38a78c32fca4f3bd2b81d16f7dc