Log when MRP params are set by Matter.framework API clients.

Author: bzbarsky-apple

src/darwin/Framework/CHIP/MTRDeviceControllerFactory.mm

@@ -1200,6 +1200,10 @@ - (void)setMessageReliabilityProtocolIdleRetransmitMs:(nullable NSNumber *)idleR
                           additionalRetransmitDelayMs:(nullable NSNumber *)additionalRetransmitDelayMs
 {
     [self _assertCurrentQueueIsNotMatterQueue];
+
+    MTR_LOG("%@ setting MRP params: idle %@ active %@ threshold %@ additional retransmit delay %@",
+        idleRetransmitMs, activeRetransmitMs, activeThresholdMs, additionalRetransmitDelayMs);
+
     dispatch_async(_chipWorkQueue, ^{
         bool resetAdvertising;
         if (idleRetransmitMs == nil && activeRetransmitMs == nil && activeThresholdMs == nil && additionalRetransmitDelayMs == nil) {