[WebImageView] Sending broadcast when bundle is invalid

When an invalud bundle:// image is attempted, we will broadcast this to the app, which has the proper utilities to log this in our metrics.

https://app.asana.com/0/15806589412090/14840636833312
Updated action string for invalid bundles to be in the WebImageView namespace instead of Yelps
Merge pull request #14 from Yelp/coltin/webimageview/broadcast_invalid_bundle_url

[WebImageView] Sending broadcast when bundle is invalid