AF Inline: Notify the registered AutofillCallback, also fix filtering.

This is missing notifications on the suggestions being hidden/shown
while filtering, but that is a bit harder to solve as we have to pipe
this state back from AutofillInlineSessionController. (although, I'm not
certain we even want this behavior, however it is inconsistent with the
dropdown behavior for now)

See bugs linked for what is fixed for filtering (some are not marked as
fixed as they still might need cts tests).
The main change is to make the privacy protection mechanism a bit
smarter - it now only applies to text-matching based logic.

Fix: 157763435
Fix: 156930859
Bug: 155517211
Bug: 157762527
Test: atest CtsAutoFillServiceTestCases:DatasetFilteringInlineTest \
  CtsAutoFillServiceTestCases:InlineFilteringTest \
  CtsAutoFillServiceTestCases:DatasetFilteringDropdownTest
Test: atest android.autofillservice.cts.inline
Change-Id: Icf94e21ba0df3b15a32454038772967cc1f6da79