api: Use RawParameter when passing queue_id and local_id

This endpoint in particular expects queue_id and local_id each to
be a String just passed as itself, not JSON-encoded.

Author: PIG208

lib/api/route/messages.dart

@@ -193,8 +193,8 @@ Future<SendMessageResult> sendMessage(
         'to': destination.userIds,
       }}),
     'content': RawParameter(content),
-    if (queueId != null) 'queue_id': queueId, // TODO should this use RawParameter?
-    if (localId != null) 'local_id': localId, // TODO should this use RawParameter?
+    if (queueId != null) 'queue_id': RawParameter(queueId),
+    if (localId != null) 'local_id': RawParameter(localId),
     if (readBySender != null) 'read_by_sender': readBySender,
   },
   overrideUserAgent: switch ((supportsReadBySender, readBySender)) {

test/api/route/messages_test.dart

@@ -362,8 +362,8 @@ void main() {
             'to': streamId.toString(),
             'topic': topic,
             'content': content,
-            'queue_id': '"abc:123"',
-            'local_id': '"456"',
+            'queue_id': 'abc:123',
+            'local_id': '456',
             'read_by_sender': 'true',
           });
       });