[mob][face] Fix clear table query

mobile/lib/face/db.dart

@@ -129,7 +129,7 @@ class FaceMLDataDB {
   Future<void> clearTable() async {
     final db = await instance.database;
     await db.delete(facesTable);
-    await db.delete(createClusterTable);
+    await db.delete(clustersTable);
     await db.delete(clusterSummaryTable);
     await db.delete(peopleTable);
     await db.delete(notPersonFeedback);