Summary:
Currently if an RN app is started in response to a remote notification, that notification's data is available on startup via `PushNotificationIOS.popInitialNotification()`. However, if the app is started in response to a "local" notification, that information is never passed in. This PR modifies the `popInitialNotification` behavior so it will return the notification used to launch the app, no matter if it was local or remote.
I've tested this change in my app and ensured that when the app is woken up with a `localNotification` it's passed in to `PushNotificationIOS.popInitialNotification`. I've also tested that the `localNotification` event continues working as before.
Closes https://github.com/facebook/react-native/pull/7765
Differential Revision: D3417267
Pulled By: nicklockwood
fbshipit-source-id: 0b5b432e9a75dda7d3c50289a3bf0f1c1ffcf061
57d45235ec