New Autofill API: SaveInfo.addSanitizer()

Test: cts-tradefed run commandAndExit cts-dev -m CtsAutoFillServiceTestCases -t android.autofillservice.cts.SimpleSaveActivityTest#testDontSaveWhenSanitizedValueDidntChange
Test: cts-tradefed run commandAndExit cts-dev -m CtsAutoFillServiceTestCases -t android.autofillservice.cts.SimpleSaveActivityTest#testSanitizeOnSave
Test: cts-tradefed run commandAndExit cts-dev -m CtsAutoFillServiceTestCases -t android.autofillservice.cts.TextValueSanitizerTest
Test: cts-tradefed run commandAndExit cts-dev -m CtsAutoFillServiceTestCases -t android.autofillservice.cts.SaveInfoTest

Bug: 67370425

Change-Id: Ie13789a08da98bea4abfd4ae87b17fd3eff24e17