[Fabric-Admin] We should only start the reverse commission process if the local fabric bridge is ready. (project-chip#35079)

* [Fabric-Admin] We should only start the reverse commission process if the local fabric is ready.

* Fix compile error

Author: yufengwangca

examples/fabric-admin/commands/fabric-sync/FabricSyncCommand.cpp

@@ -64,13 +64,16 @@ void FabricSyncAddBridgeCommand::OnCommissioningComplete(NodeId deviceId, CHIP_E
 
         DeviceMgr().SubscribeRemoteFabricBridge();
 
-        // After successful commissioning of the Commissionee, initiate Reverse Commissioning
-        // via the Commissioner Control Cluster. However, we must first verify that the
-        // remote Fabric-Bridge supports Fabric Synchronization.
-        //
-        // Note: The Fabric-Admin MUST NOT send the RequestCommissioningApproval command
-        // if the remote Fabric-Bridge lacks Fabric Synchronization support.
-        DeviceLayer::PlatformMgr().ScheduleWork(CheckFabricBridgeSynchronizationSupport, 0);
+        if (DeviceMgr().IsLocalBridgeReady())
+        {
+            // After successful commissioning of the Commissionee, initiate Reverse Commissioning
+            // via the Commissioner Control Cluster. However, we must first verify that the
+            // remote Fabric-Bridge supports Fabric Synchronization.
+            //
+            // Note: The Fabric-Admin MUST NOT send the RequestCommissioningApproval command
+            // if the remote Fabric-Bridge lacks Fabric Synchronization support.
+            DeviceLayer::PlatformMgr().ScheduleWork(CheckFabricBridgeSynchronizationSupport, 0);
+        }
     }
     else
     {