Also fix some warnings. NOTRY=True BUG=webrtc:6954 Review-Url: https://codereview.webrtc.org/2611663002 Cr-Commit-Position: refs/heads/master@{#15900}
The CL fixes adds tests that fully test the functions that manipulate the cricket::VideoFormat<->AVCaptureDeviceFormat relation. BUG=webrtc:6680 Review-Url: https://codereview.webrtc.org/2526813002 Cr-Commit-Position: refs/heads/master@{#15444}