Originally one field classification algorithm was used to classify every field. The change allows different category of fields to be classified by different field classification algorithms. Change-Id: I27205a4096774d6e0c0d56da5e0fd38dda995d8f Fixes: 118681526 Test: atest CtsAutoFillServiceTestCases Test: atest android.autofillservice.cts.FieldsClassificationTest