support ngram and fst hotword for 2pass-offline (#1205)

Yabin Li

2023-12-26 b8825902d93d5017e44828316062dc8306b7ddcd

1
2
3
4
5
6
7
8
9
c    1
cc    2
ccc    3
cd    4
d    5
dc    6
dcc    7
dccc    8
cm    9