fix: make it impossible to overwrite default key

Replacing default key
when a profile is already part of
verified groups results in
`[The message was sent with non-verified encryption. See 'Info' for more details]`
messages for other users.

It is still possible
to import the default key before
Delta Chat generates the key.

deltachat-rpc-client/src/deltachat_rpc_client/account.py

@@ -359,3 +359,7 @@ class Account:
         """Import keys."""
         passphrase = ""  # Importing passphrase-protected keys is currently not supported.
         self._rpc.import_self_keys(self.id, str(path), passphrase)
+
+    def initiate_autocrypt_key_transfer(self) -> None:
+        """Send Autocrypt Setup Message."""
+        return self._rpc.initiate_autocrypt_key_transfer(self.id)

deltachat-rpc-client/src/deltachat_rpc_client/message.py

@@ -52,6 +52,9 @@ class Message:
         """Mark the message as seen."""
         self._rpc.markseen_msgs(self.account.id, [self.id])
 
+    def continue_autocrypt_key_transfer(self, setup_code: str) -> None:
+        self._rpc.continue_autocrypt_key_transfer(self.account.id, self.id, setup_code)
+
     def send_webxdc_status_update(self, update: Union[dict, str], description: str) -> None:
         """Send a webxdc status update. This message must be a webxdc."""
         if not isinstance(update, str):