VkFunctorDrawable implementation

Bug: 115613038
Test: Turning on vulkan with appropriate webview apk does not crash and
sort of works.
Change-Id: If1504da7a35e4bd74a994ab2c2a351e6bc415a18
diff --git a/libs/hwui/renderthread/VulkanManager.h b/libs/hwui/renderthread/VulkanManager.h
index 9eb942c..105ee09 100644
--- a/libs/hwui/renderthread/VulkanManager.h
+++ b/libs/hwui/renderthread/VulkanManager.h
@@ -132,6 +132,9 @@
     // Creates a fence that is signaled, when all the pending Vulkan commands are flushed.
     status_t createReleaseFence(sp<Fence>& nativeFence);
 
+    // Returned pointers are owned by VulkanManager.
+    VkFunctorInitParams getVkFunctorInitParams() const;
+
 private:
     friend class RenderThread;
 
@@ -234,6 +237,12 @@
 
     VkCommandBuffer mDummyCB = VK_NULL_HANDLE;
 
+    // Variables saved to populate VkFunctorInitParams.
+    uint32_t mInstanceVersion = 0u;
+    std::vector<const char*> mInstanceExtensions;
+    std::vector<const char*> mDeviceExtensions;
+    VkPhysicalDeviceFeatures2 mPhysicalDeviceFeatures2{};
+
     enum class SwapBehavior {
         Discard,
         BufferAge,