Add error log when failing to convert CDP messageStr (#54962)

Summary:
Pull Request resolved: #54962

Following, D89659683 add a debug error log whenever a failing `NSStringFromUTF8StringView()` conversion means we ignore delivering a CDP message on iOS.

There is probably scope to fail more loudly here (crash the app, or send a debug CDP event to the frontend), but am inserting this for now.

Changelog: [Internal]

Reviewed By: vzaidman

Differential Revision: D89659685

fbshipit-source-id: 3fe772ed879a33aa86b5eb1a0edf38c2804d7448

Author: huntie

packages/react-native/React/Inspector/RCTCxxInspectorWebSocketAdapter.mm

@@ -47,6 +47,9 @@ - (void)send:(std::string_view)message
 {
   __weak RCTCxxInspectorWebSocketAdapter *weakSelf = self;
   NSString *messageStr = NSStringFromUTF8StringView(message);
+  if (messageStr == nil) {
+    RCTLogError(@"Failed to convert CDP message string to NSString, message will be dropped!");
+  }
   dispatch_async(dispatch_get_main_queue(), ^{
     RCTCxxInspectorWebSocketAdapter *strongSelf = weakSelf;
     if (strongSelf != nullptr) {