Very initial field detection prototype.

A.K.A "OMG, It's full of TODOs!"

Test: cts-tradefed run commandAndExit cts-dev -m CtsAutoFillServiceTestCases -t android.autofillservice.cts.FieldsDetectionTest

Bug: 67867469

Change-Id: I7c8f7c3e35ccbae0134e2a446b7b44e1e57261fc
8 files changed