[Darwin] API to list all network commissioning features supported by an MTRDevice (#36479)

* [Darwin] API to list all network commissioning features supported by an MTRDevice

- Expose the network commissioning feature bitset as API to know what
  transports are supported by the device.

* Code review comments

* Code review comments

* Restyled by clang-format

---------

Co-authored-by: Restyled.io <commits@restyled.io>

Author: anush-apple

src/darwin/Framework/CHIP/MTRDevice.h

@@ -17,6 +17,7 @@
 
 #import <Foundation/Foundation.h>
 #import <Matter/MTRAttributeValueWaiter.h>
+#import <Matter/MTRBaseClusters.h>
 #import <Matter/MTRBaseDevice.h>
 #import <Matter/MTRDefines.h>
 
@@ -122,6 +123,11 @@ MTR_AVAILABLE(ios(16.1), macos(13.0), watchos(9.1), tvos(16.1))
  */
 @property (nonatomic, readonly, nullable, copy) NSNumber * productID MTR_NEWLY_AVAILABLE;
 
+/**
+ * Network commissioning features supported by the device.
+ */
+@property (nonatomic, readonly) MTRNetworkCommissioningFeature networkCommissioningFeatures MTR_NEWLY_AVAILABLE;
+
 /**
  * Set the delegate to receive asynchronous callbacks about the device.
  *

src/darwin/Framework/CHIP/MTRDevice_Concrete.mm

@@ -514,6 +514,12 @@ - (nullable NSNumber *)productID
     return [_pid copy];
 }
 
+- (MTRNetworkCommissioningFeature)networkCommissioningFeatures
+{
+    std::lock_guard lock(_descriptionLock);
+    return [_allNetworkFeatures unsignedIntValue];
+}
+
 - (void)_notifyDelegateOfPrivateInternalPropertiesChanges
 {
     os_unfair_lock_assert_owner(&self->_lock);

src/darwin/Framework/CHIP/MTRDevice_XPC.mm

@@ -141,6 +141,11 @@ - (nullable NSNumber *)productID
     return [[self._internalState objectForKey:kMTRDeviceInternalPropertyKeyProductID] copy];
 }
 
+- (MTRNetworkCommissioningFeature)networkCommissioningFeatures
+{
+    return [[self._internalState objectForKey:kMTRDeviceInternalPropertyNetworkFeatures] unsignedIntValue];
+}
+
 #pragma mark - Client Callbacks (MTRDeviceDelegate)
 
 // required methods for MTRDeviceDelegates