Implement AbstractGfx for Vulkan

Source/Core/VideoCommon/VideoBackendBase.cpp

@@ -370,9 +370,10 @@ bool VideoBackendBase::InitializeShared(std::unique_ptr<AbstractGfx> gfx,
   system.GetPixelShaderManager().Init();
   TMEM::Init();
 
-  if (!g_vertex_manager->Initialize() || !g_renderer->Initialize() || !g_presenter->Initialize() ||
-      !g_shader_cache->Initialize() || !g_framebuffer_manager->Initialize() ||
-      !g_texture_cache->Initialize() || !g_bounding_box->Initialize())
+  if (!g_vertex_manager->Initialize() || !g_shader_cache->Initialize() ||
+      !g_renderer->Initialize() || !g_presenter->Initialize() ||
+      !g_framebuffer_manager->Initialize() || !g_texture_cache->Initialize() ||
+      !g_bounding_box->Initialize())
   {
     PanicAlertFmtT("Failed to initialize renderer classes");
     Shutdown();