Change the Ambient Context Manager to return STATUS_SERVICE_UNAVAILABLE instead of STATUS_NOT_SUPPORTED when the detection service is not set up.

Test: mmma frameworks/base
BUG: 242480433
Change-Id: I7ea332b9447086e9a71f4ee27beac2ac45f4762f

services/core/java/com/android/server/ambientcontext/AmbientContextManagerPerUserService.java

@@ -220,7 +220,7 @@ final class AmbientContextManagerPerUserService extends
             } else {
                 Slog.w(TAG, "No valid component found for AmbientContextDetectionService");
                 sendStatusToCallback(clientStatusCallback,
-                        AmbientContextManager.STATUS_NOT_SUPPORTED);
+                        AmbientContextManager.STATUS_SERVICE_UNAVAILABLE);
             }
         }
     }