Support application restarts

[harshithdwivedi]

See if the InterceptorRequest can be saved to the db

To support offline mutations even when the app is closed, we need to persist the requests in our db.

https://github.com/apollographql/apollo-android/blob/master/apollo-runtime/src/main/java/com/apollographql/apollo/interceptor/ApolloInterceptor.java#L114

Not of immediate concern but something that we should be aware of.

[wtrocki]

I have checked that and we cannnot save this and this even makes no sense.
We need to simply execute mutations again based on the database entires on application start.
Same as we do in offix-js. This is very trivial task but it will make sure that data is not lost