Fix message handling in example

@@ -111,8 +111,6 @@ class CallViewModel(
     private val mutablePermissionAllowed = MutableStateFlow(true)
     val permissionAllowed = mutablePermissionAllowed.hide()
 
-    var messagesReceived = 0
-
     init {
         viewModelScope.launch {
             // Collect any errors.
@@ -139,8 +137,8 @@ class CallViewModel(
                         is RoomEvent.FailedToConnect -> mutableError.value = it.error
                         is RoomEvent.DataReceived -> {
                             val identity = it.participant?.identity ?: "server"
-                            messagesReceived++
-                            Timber.e { "message received from $identity, count $messagesReceived" }
+                            val message = it.data.toString(Charsets.UTF_8)
+                            mutableDataReceived.emit("$identity: $message")
                         }
 
                         else -> {