Add the initialization parameters OF LR FTRL

Angel's model, after adding features, does not currently support incremental training.
For example, the model has n features before, now add m features, and now there are a total of n+m features.
If possible, trouble provides an API that initializes the LR FTRL initialization parameters, initializes a model with the parameters of another model, and then starts training, which makes it more suitable for incremental training scenarios.