Removed deprecated setAuthentication() method that didn't take ids.

Such method would cause the AutofillUi to show on all fields, now it only
shows in the fields the service is interested on.

This doesn't solve FillResponse auth on multiple partition, but that will
come soon...

Bug: 37424539
Test: removed hack from testFillResponseAuthJustOneField()
Test: CtsAutoFillServiceTestCases pass

Change-Id: Id97dddfb9fc1630cd6bac96b9bae9d4a2986dd6d