support offline inference for unified streaming/non-streaming rnnt

aky15

2023-08-14 a5cd4bb473b19fe2af1753fa7e60a997a8208447

 egs/alimeeting/sa_asr/README.md

@@ -76,7 +76,7 @@
        <td>49.37</td>
   </tr>
</table> -->
|                |SI-CER(%)     |cp-CER(%)  |
|                |SI-CER(%)     |cpCER(%)  |
|:---------------|:------------:|----------:|
|oracle profile  |32.72         |42.92      |
|cluster  profile|32.73         |49.37      |