Summary:This is just the JS part of a bug reporting module that can be used with a pure JS flow or a native reporting
flow. It's handy for grabbing data from a bunch of random components, like the ids of the rows that are visible in a
list view at the time the bug is reported, or a description of the current navigation stack.
It's initialized in `AppRegistry` so it's always ready to go and bug reports will always include the universal
`runApplication` info, but won't actually do anything by default unless `collectExtraData` is called.
Note: some apps may call `runApplication` multiple times if they have multiple react native root views. This will just
overwrite the source so it will just report the most recently mounted one.
Reviewed By: foghina
Differential Revision: D3200203
fb-gh-sync-id: 8ed45fc9b289e8d9c50d3c85926213bd245d3ecc
fbshipit-source-id: 8ed45fc9b289e8d9c50d3c85926213bd245d3ecc
Spencer Ahrens
ad15b74aae