- Create an unit test skeleton for VideoReceiveStream.
- Add an actual test case for creating a frame from H264 Sprop Parameter
Sets and an Rtp H264 IDR Nalu.
BUG=webrtc:5948
Review-Url: https://codereview.webrtc.org/2721653002
Cr-Commit-Position: refs/heads/master@{#16892}