Add a settings key to expose the device's repair mode state

Bug: 277561275
Test: atest SettingsBackupTest
Change-Id: I35dd77bb99ca7e2eecc8439c2c61481c658c5052

core/java/android/provider/Settings.java

@@ -17977,6 +17977,15 @@ public final class Settings {
         public static final String REVIEW_PERMISSIONS_NOTIFICATION_STATE =
                 "review_permissions_notification_state";
 
+        /**
+         * Whether repair mode is active on the device.
+         * <p>
+         * Set to 1 for true and 0 for false.
+         *
+         * @hide
+         */
+        public static final String REPAIR_MODE_ACTIVE = "repair_mode_active";
+
         /**
          * Settings migrated from Wear OS settings provider.
          * @hide

packages/SettingsProvider/test/src/android/provider/SettingsBackupTest.java

@@ -591,6 +591,7 @@ public class SettingsBackupTest {
                     Settings.Global.APPOP_HISTORY_BASE_INTERVAL_MILLIS,
                     Settings.Global.AUTO_REVOKE_PARAMETERS,
                     Settings.Global.ENABLE_RADIO_BUG_DETECTION,
+                    Settings.Global.REPAIR_MODE_ACTIVE,
                     Settings.Global.RADIO_BUG_WAKELOCK_TIMEOUT_COUNT_THRESHOLD,
                     Settings.Global.RADIO_BUG_SYSTEM_ERROR_COUNT_THRESHOLD,
                     Settings.Global.ENABLED_SUBSCRIPTION_FOR_SLOT,