[Relayout] Part 4: Implement core logic

Re-attempt when autofill fails

Bug: 238252288
Flag: EXEMPT : DeviceConfig flags used: enable_relayout
exception granted in b/318391032
Test: atest CtsAutoFillServiceTestCases
      atest FrameworksCoreTests:AutofillStateFingerprint

Change-Id: I302584adbd6da338019663203941b5bc2173b7e7