Running a native image on GCP (Cloud Run) throws error 400

Hi,

Compiling to native this dependency:
```java

com.google.firebase
firebase-admin
9.2.0

```

makes the build fail because grpc-netty-shaded, however with this alternative we can compile:
```java

com.google.firebase
firebase-admin
9.2.0


io.grpc
grpc-netty-shaded

io.grpc
grpc-okhttp
1.51.1

```

The problem is that FCM client always responds with error 400:
```javascript
Exception in thread "main" com.google.firebase.messaging.FirebaseMessagingException: Unexpected HTTP response with status: 400
{
"error": {
"code": 400,
"message": "Recipient of the message is not set.",
"status": "INVALID_ARGUMENT",
"details": [
{
"@type": "type.googleapis.com/google.rpc.BadRequest",
"fieldViolations": [
{
"field": "message",
"description": "Recipient of the message is not set."
}
]
},
{
"@type": "type.googleapis.com/google.firebase.fcm.v1.FcmError",
"errorCode": "INVALID_ARGUMENT"
}
]
}
}
```

Running on JVM works fine.
There is a issue with same problem: https://github.com/GoogleCloudPlatform/native-image-support-java/issues/116 for the old google native support libraries. Their workarounds didn't work for me.

Are there any know solutions?
Thanks

Start with the Firebase Admin dependency declarations and the Firebase Cloud Messaging client running as a native image on Cloud Run, comparing the reported JVM and native-image behavior. Reproduce the 400 response with the grpc-netty-shaded exclusion and grpc-okhttp substitution, then determine whether the issue is in request construction or the native-image configuration. Done means documenting a supported configuration or a minimal reproducible diagnosis.

Written by the indexing model from the issue text.