add method for credential updates

Author: lukasIO

livekit-rtc/livekit/rtc/frame_processor.py

@@ -16,14 +16,17 @@ def is_enabled(self) -> bool: ...
     def set_enabled(self, enable: bool): ...
 
     @abstractmethod
-    def _set_context(
+    def _update_stream_info(
         self,
         *,
         room_name: str,
         participant_identity: str,
         publication_sid: str,
     ): ...
 
+    @abstractmethod
+    def _update_credentials(self, *, token: str, url: str): ...
+
     @abstractmethod
     def _process(self, frame: T) -> T: ...