Current VoIP Engine logic stops ADM from polling registered audio
channel when caller invokes StopPlay which can leads to incoming
RTP to be flushed and undesirable statistics report.
Instead, VoipBase::StopPlay should silence the decoded audio sample
from NetEq as muted to avoid mixing while allowing it go through prior
process for correct ingress statistic values.
The ADM stop playing logic will be triggered when all audio channels
are released by VoipBase::ReleaseChannel API.
Bug: webrtc:12121
Change-Id: I410eea4ea13f93acb465ab162a3c14c9819e2b92
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/191140
Commit-Queue: Tim Na <natim@webrtc.org>
Reviewed-by: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32553}
4552e8f2d4