Refactor creation of GrVkRenderPasses to make them move general

src/gpu/vk/GrVkRenderTarget.h

Index: src/gpu/vk/GrVkRenderTarget.h
diff --git a/src/gpu/vk/GrVkRenderTarget.h b/src/gpu/vk/GrVkRenderTarget.h
index accc677806194ec5fa432ebec50c2e8d1e8c5f4d..0467371ecb0589fb83546331da09b6282a1b942a 100644
--- a/src/gpu/vk/GrVkRenderTarget.h
+++ b/src/gpu/vk/GrVkRenderTarget.h
@@ -13,6 +13,7 @@
 #include "GrRenderTarget.h"
 
 #include "GrVkRenderPass.h"
+#include "GrVkResourceProvider.h"
 
 class GrVkCommandBuffer;
 class GrVkFramebuffer;
@@ -135,6 +136,8 @@ private:
     // This is a cached pointer to a simple render pass. The render target should unref it
     // once it is done with it.
     const GrVkRenderPass*      fCachedSimpleRenderPass;
+    // This is a handle to be used to quickly get compatible GrVkRenderPasses for this render target
+    GrVkResourceProvider::CompatibleRPHandle fCompatibleRPHandle;
 };
 
 #endif