Add Autofill PCC Detection APIs for Autofill Providers

1. List of types to send back - FillRequest list
2. Flags in SaveInfo to allow types without ids
3. Datasets now also contain optional types

Also adds framework flags to turn on this feature

Fix: 261106877
Test: ag/21089916
Change-Id: Ife466d257a024ad4eb862b2a796801f00a2d7800