Move concurrentSubscriptionPool property to MTRDeviceController_Concr…

…ete. (project-chip#36328)

The non-concrete case does not directly create subscriptions, so has no need of
a pool for them.

src/darwin/Framework/CHIP/MTRDeviceController_Concrete.h

@@ -26,6 +26,7 @@
 #import <Matter/MTRDeviceStorageBehaviorConfiguration.h>
 #import <Matter/MTROTAProviderDelegate.h>
 
+#import "MTRAsyncWorkQueue.h"
 #import "MTRDeviceConnectionBridge.h"
 #import "MTRDeviceControllerStartupParams_Internal.h"
 
@@ -226,6 +227,12 @@ NS_ASSUME_NONNULL_BEGIN
  */
 @property (readonly) chip::FabricIndex fabricIndex;
 
+/**
+ * A queue with a fixed width that allows a number of MTRDevice objects to perform
+ * subscription at the same time.
+ */
+@property (nonatomic, readonly) MTRAsyncWorkQueue<MTRDeviceController *> * concurrentSubscriptionPool;
+
 @end
 
 NS_ASSUME_NONNULL_END

src/darwin/Framework/CHIP/MTRDeviceController_Concrete.mm

@@ -106,8 +106,6 @@ @interface MTRDeviceController_Concrete ()
 @property (nonatomic, readonly, nullable) MTRAttestationTrustStoreBridge * attestationTrustStoreBridge;
 @property (nonatomic, readonly, nullable) NSMutableArray<MTRServerEndpoint *> * serverEndpoints;
 
-@property (nonatomic, readonly) MTRAsyncWorkQueue<MTRDeviceController *> * concurrentSubscriptionPool;
-
 @property (nonatomic, readonly) MTRDeviceStorageBehaviorConfiguration * storageBehaviorConfiguration;
 
 // Whether we should be advertising our operational identity when we are not suspended.

src/darwin/Framework/CHIP/MTRDeviceController_Internal.h

@@ -41,7 +41,6 @@
 @class MTRDeviceControllerParameters;
 @class MTRDeviceControllerFactory;
 @class MTRDevice;
-@class MTRAsyncWorkQueue;
 @protocol MTRDevicePairingDelegate;
 @protocol MTRDeviceControllerDelegate;
 @class MTRDevice_Concrete;
@@ -78,12 +77,6 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic, readonly, nullable) id<MTROTAProviderDelegate> otaProviderDelegate;
 @property (nonatomic, readonly, nullable) dispatch_queue_t otaProviderDelegateQueue;
 
-/**
- * A queue with a fixed width that allows a number of MTRDevice objects to perform
- * subscription at the same time.
- */
-@property (nonatomic, readonly) MTRAsyncWorkQueue<MTRDeviceController *> * concurrentSubscriptionPool;
-
 /**
  * Fabric ID tied to controller
  */

src/darwin/Framework/CHIP/MTRDevice_Concrete.mm

@@ -1245,7 +1245,7 @@ - (void)_scheduleSubscriptionPoolWork:(dispatch_block_t)workBlock inNanoseconds:
 
             workBlock();
         }];
-        [self->_deviceController.concurrentSubscriptionPool enqueueWorkItem:workItem description:description];
+        [[[self _concreteController] concurrentSubscriptionPool] enqueueWorkItem:workItem description:description];
         MTR_LOG("%@ - enqueued in the subscription pool", self);
     };