Made Autofill Field Classification API public and documented it.

Test: mmm frameworks/base/:doc-comment-check-docs
Test: atest FrameworksCoreTests:SettingsBackupTest
Test: m -j 100 update-api

Fixes: 67867469

Change-Id: Iedf56a2bbcde3826eb22f5ed7a96d6ed70b968f4
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index 907a1b8..1002453 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -421,13 +421,6 @@
     private static final Set<String> BACKUP_BLACKLISTED_SECURE_SETTINGS =
              newHashSet(
                  Settings.Secure.ACCESSIBILITY_SOFT_KEYBOARD_MODE,
-                 // TODO(b/67867469): Move autofill settings below to
-                 // BACKUP_BLACKLISTED_SYSTEM_SETTINGS once feature is moved out of experimental
-                 Settings.Secure.AUTOFILL_FEATURE_FIELD_CLASSIFICATION,
-                 Settings.Secure.AUTOFILL_USER_DATA_MAX_FIELD_CLASSIFICATION_IDS_SIZE,
-                 Settings.Secure.AUTOFILL_USER_DATA_MAX_USER_DATA_SIZE,
-                 Settings.Secure.AUTOFILL_USER_DATA_MAX_VALUE_LENGTH,
-                 Settings.Secure.AUTOFILL_USER_DATA_MIN_VALUE_LENGTH,
                  Settings.Secure.ALLOWED_GEOLOCATION_ORIGINS,
                  Settings.Secure.ALWAYS_ON_VPN_APP,
                  Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN,
@@ -437,6 +430,11 @@
                  Settings.Secure.ASSIST_DISCLOSURE_ENABLED,
                  Settings.Secure.ASSIST_SCREENSHOT_ENABLED,
                  Settings.Secure.ASSIST_STRUCTURE_ENABLED,
+                 Settings.Secure.AUTOFILL_FEATURE_FIELD_CLASSIFICATION,
+                 Settings.Secure.AUTOFILL_USER_DATA_MAX_FIELD_CLASSIFICATION_IDS_SIZE,
+                 Settings.Secure.AUTOFILL_USER_DATA_MAX_USER_DATA_SIZE,
+                 Settings.Secure.AUTOFILL_USER_DATA_MAX_VALUE_LENGTH,
+                 Settings.Secure.AUTOFILL_USER_DATA_MIN_VALUE_LENGTH,
                  Settings.Secure.AUTOFILL_SERVICE_SEARCH_URI,
                  Settings.Secure.AUTOMATIC_STORAGE_MANAGER_BYTES_CLEARED,
                  Settings.Secure.AUTOMATIC_STORAGE_MANAGER_ENABLED,