amlvideosink: CB2 send underflow msg [1/1]

PD#SWPL-144613

Problem:
NTS case failed because underflow msg lossed

Solution:
send underflow msg

Verify:
ah212

Change-Id: I1f4c4850c4bae653d337c3497193d585d64fae3f
Signed-off-by: fei.deng <fei.deng@amlogic.com>
1 file changed