Change default value of AFAA flags to be on.

Bug: 282194993
Test: atest CtsAutoFillServiceTestCases (https://screenshot.googleplex.com/7SwwcQniudkXAkt)
      Two tests failed, one is marked with flaky already (testAutofill_appContext). The other one (testSetDelayFillFlagTwiceButIntentCanOnlyBeSentOnce) I tried locally is passing 6/10, so probably also a flaky test.

Change-Id: I718e585eda34e1060327fb89163ff8a8730a4578