vulkan: fix canvas rendering (on android)

Before this patch, sometimes rendering a texture
on an android device would result in random things
appearing in the canvas, apart from the stuff
that has been drawn properly.
With these changes this does not seem to appear anymore.

src/modules/graphics/vulkan/Graphics.h

@@ -27,6 +27,7 @@ struct RenderPassConfiguration {
 	std::vector<VkFormat> colorFormats;
 
 	struct StaticRenderPassConfiguration {
+		VkImageLayout initialColorImageLayout = VK_IMAGE_LAYOUT_UNDEFINED;
 		VkSampleCountFlagBits msaaSamples = VK_SAMPLE_COUNT_1_BIT;
 		VkFormat depthFormat = VK_FORMAT_UNDEFINED;
 		bool resolve = false;