Log VideoSendStreamImpl::Stop in logs
Log VideoSendStreamImpl::Stop in logs

Removes confusion in the logs because both VideoSendStream and
VideoSendStreamImpl use the same log line.

Bug: None
Change-Id: Id9e22f23341e134667ab5f8e308732c836ab213d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/195328
Reviewed-by: Ilya Nikolaevskiy <76788ac3efd229e9d156135d9ceb7fef65c45da4@webrtc.org>
Commit-Queue: Evan Shrubsole <7a4ae6b96648f94a29a5ec4b2747fe0ea094fcde@google.com>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#32693}

ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc