Handle deseralization errors

[rtpt-romankarwacik]

We had the case where a keycredentiallink could not be deserialized, but needed to be restored after an attack was conducted. This pull request adds checks for if the DeviceId was serialized properly, to list the keycredentialslink regardless in that case. Furthermore, when exporting and importing, deserialization errors are handled by saving the raw keycredentiallink instead.