Moved Field Classification score logic to ExtServices.

Bug: 70939974
Test: atest CtsAutoFillServiceTestCases:FieldsClassificationTest \
            CtsAutoFillServiceTestCases:UserDataTest
Test: atest CtsAutoFillServiceTestCases

Change-Id: I75fd59b5d7530fcd7095b26f6e592d7459c7d235
16 files changed