Always let standard autofill try on new partitions even if session was

marked as augmented only.

* Currently if a session was marked as augmented only, we will never
allow standard autofill a chance again. Sometimes activities contain
views with IMPORTANT_FOR_AUTOFILL_NO which marks the session as
augmenteed only, but other fields can still be filled by standard
autofill.

Fixes: 187555283
Test: atest android.autofillservice.cts.augmented.AugmentedLoginActivityTest
Change-Id: I1c685a1159db4fc8b3d285b7c74d767555c9bf10