[Autofill] Migrate aconfig flag

migrate services/autofill/bugfixes.aconfig#ignore_view_state_reset_to_empty to deviceconfig

Bug: 297976948
Bug: 327225585
Test: atest CtsAutofillServiceTestCases

Change-Id: I427723fb0a3c4b640eb46adaae6086531d5d5d8d
2 files changed