feat: audio filter plugin (#350)

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

Author: typester

livekit-rtc/livekit/rtc/__init__.py

@@ -36,7 +36,8 @@
 from ._proto.video_frame_pb2 import VideoBufferType, VideoCodec, VideoRotation
 from .audio_frame import AudioFrame
 from .audio_source import AudioSource
-from .audio_stream import AudioFrameEvent, AudioStream
+from .audio_stream import AudioFrameEvent, AudioStream, NoiseCancellationOptions
+from .audio_filter import AudioFilter
 from .chat import ChatManager, ChatMessage
 from .e2ee import (
     E2EEManager,
@@ -108,6 +109,8 @@
     "AudioFrame",
     "AudioSource",
     "AudioStream",
+    "NoiseCancellationOptions",
+    "AudioFilter",
     "AudioFrameEvent",
     "LocalParticipant",
     "Participant",