Convert webrtcvideoengine CVO tests away from cricket::VideoCapturer.
Convert webrtcvideoengine CVO tests away from cricket::VideoCapturer.

Bug: webrtc:6353
Change-Id: I1f4f705cda4fdf88465395898e2588b2a19eebf3
Reviewed-on: https://webrtc-review.googlesource.com/83324
Reviewed-by: Magnus Jedvert <9507adee858471ab168c339dc72b814b168c081b@webrtc.org>
Commit-Queue: Niels Moller <0057859e47d61d90529d0f66d9ef692cefedb46a@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#24142}
TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc