Native ads do not trigger `AD_RENDER_SUCCEEDED` / `AD_RENDER_FAILED`

[dgirardi]

Describe the bug

Rendering a native ad does not trigger the AD_RENDER_SUCCEEDED & FAILED event like banner ads do.

To Reproduce
Steps to reproduce the behavior:

Render any ad through the PUC native-render.js.

[patmmccann]

Aside: succeeded is rather misleading, we may want to rename 'attempted' or similar