[Autofill PCC Detection] Provide detection info during save.

Provide detection info during save, so that the provider can trigger
save properly in the case of misdeteciton. Otherwise, provider may
save it for wrong fields, or may decide not to save at all.

Test: atest CtsAutoFillServiceTestCases.
Some tests were failing, but they were failing irrespective of this
change.
Bug: 277538115

Change-Id: I8a78e1c483339cb3ba8086224942108a77a93c55