Flash Injector: Investigate D3D12 diagnostic layer errors on flash render

[planetchili]

Running with a known internal app shows errors during flash render (resources not transitioned properly). Does not seem to affect rendering, but worthwhile to investigate a better injected rendering process. Also test the injected render on several production D3D12 titles to check for any rendering issues, and check to see if there is performance degradation associated with these errors.