Add SETUP_WIZARD_IN_PROGRESS flag to CarSettings

Bug: 144846684
Test: Manually
Change-Id: I8ad6f1e198591092a171a4d3fe1a1a0eda169324
(cherry picked from commit 2449138120c85a0526a69bcabe6927d867a7fc17)
diff --git a/car-lib/src/android/car/settings/CarSettings.java b/car-lib/src/android/car/settings/CarSettings.java
index ab7c906..d81b7ad 100644
--- a/car-lib/src/android/car/settings/CarSettings.java
+++ b/car-lib/src/android/car/settings/CarSettings.java
@@ -153,5 +153,14 @@
          */
         public static final String KEY_ENABLE_INITIAL_NOTICE_SCREEN_TO_USER =
                 "android.car.ENABLE_INITIAL_NOTICE_SCREEN_TO_USER";
+
+        /**
+         * Key to indicate Setup Wizard is in progress. It differs from USER_SETUP_COMPLETE in
+         * that this flag can be reset to 0 in deferred Setup Wizard flow.
+         * The value is boolean (1 or 0).
+         * @hide
+         */
+        public static final String KEY_SETUP_WIZARD_IN_PROGRESS =
+                "android.car.SETUP_WIZARD_IN_PROGRESS";
     }
 }