Refactor Vulkan image, texture, RTs so that create and getter handles match.

src/gpu/vk/GrVkPipelineState.h

Index: src/gpu/vk/GrVkPipelineState.h
diff --git a/src/gpu/vk/GrVkPipelineState.h b/src/gpu/vk/GrVkPipelineState.h
index ea988861ef521436ffae754c8144788e5a83abf7..d4cc19a9a330d7e7477e7fd7dad67ae7469dca8c 100644
--- a/src/gpu/vk/GrVkPipelineState.h
+++ b/src/gpu/vk/GrVkPipelineState.h
@@ -266,7 +266,7 @@ private:
     // GrVkResources used for sampling textures
     SkTDArray<GrVkSampler*> fSamplers;
     SkTDArray<const GrVkImageView*> fTextureViews;
-    SkTDArray<const GrVkImage::Resource*> fTextures;
+    SkTDArray<const GrVkResource*> fTextures;
 
     // Tracks the current render target uniforms stored in the vertex buffer.
     RenderTargetState fRenderTargetState;