state
Returns the state of the contacts restore process.
May not be launched if Competition status is not GRANTED
RestoreState.Failed may contain the following exceptions:
Throws
Session is not active.
No contacts permission.
Device in roaming.
When no internet connection.
User with exceeded quota cannot create first book.
401 http error.
Updated book is not found.
403 http error, update is not succeed.
The some request has wrong parameters. Download url not found. Update id not found.
Other.