add paraformer online opt infer code

haoneng.lhn

2023-09-14 dcb92f13eddbf3032ce363b35f13f80afa8f94d1

 egs_modelscope/asr/paraformer/speech_paraformer_asr_nat-zh-cn-16k-common-vocab8404-online/demo_online.py

@@ -15,6 +15,7 @@
    task=Tasks.auto_speech_recognition,
    model='damo/speech_paraformer_asr_nat-zh-cn-16k-common-vocab8404-online',
    model_revision='v1.0.6',
    update_model=False,
    mode="paraformer_streaming"
)