plugin XEP-0384: skip MessageReceived trigger when in a component:

OMEMO is not used in components so far, but the trigger is trying to request OMEMO PEP
nodes, which causes an error with virtual pubsub service of AP component.

sat/plugins/plugin_xep_0384.py

@@ -2113,6 +2113,8 @@ class OMEMO:
             encrypted.
         @return: Whether to continue the message received flow.
         """
+        if client.is_component:
+            return True
         muc_plaintext_cache_key: Optional[MUCPlaintextCacheKey] = None
 
         sender_jid = jid.JID(message_elt["from"])