Summary:
It seems it's a common problem people trying to register for push notifications in their simulator, and not understanding why the "register" event never works.
I've wasted a few hours myself on this issue.
This commit simply logs any failures with push registration, preventing confusion.
Closes https://github.com/facebook/react-native/pull/8046
Differential Revision: D3454922
Pulled By: javache
fbshipit-source-id: a96896d97d97cfe1bd319e6490750838dfaad3cd