Hide Autofill UI when non-savable id is gone.

AutofillManager keeps track of which views the AutofillServiec is interested to
save, so when these views are gone, the session is finished.

But when the AutofillService returns a dataset whose views it can not save,
the FillUi for these views are not hiding when the views are gone. This CL
fixes this issue by:

- Keeping track which non-savable views should be tracked.
- Pass the view (instead of it's id) when the UI on such views should be hid.

This CL also optimized some AIDL and internal calls by avoiding the creating of
unnecessary Lists.

Test: manual verification with Snapchat
Test: existing CtsAutoFillServiceTestCases pass
Test: new tests on MultipleFragmentLoginTest pass

Fixes: 38199452
Change-Id: I78fa357962dbc6667146d8e08cd6bacb63e0f337