graphics: preserve stencil view layers through uploads and clears

src/graphics/host_gpu/renderer/image/image.h

@@ -148,6 +148,8 @@ public:
 	uint64_t         track_addr     = 0;
 	uint64_t         track_addr_end = 0;
 	ImageId          depth_id {};
+	// The current stencil plane's mapping into the depth image, also retained by its association.
+	ImageSubresourceRange stencil_subresources;
 	uint64_t         tick_accessed_last = 0;
 	size_t           lru_id             = 0;