[Fill Dialog Improvements] Using Ime animation updats

Route animation updates from AutofillManagerService to Session.
The rest of the logic is already implemented.

Bug: 390528373
Flag: android.service.autofill.improve_fill_dialog_aconfig
Test: atest CtsAutoFillServiceTestCases
Change-Id: I3c17d476af5bd89817e85b95fafbcaaaa06ce7cb