Create a NetEq test for when the first incoming payload type is unknown
Create a NetEq test for when the first incoming payload type is unknown

This test is currently disabled. It triggers an issue where the NetEq
will trigger asserts on subsequent GetAudio calls if the first inserted
packet is rejected, for instance since the payload type is unknown to
NetEq.

BUG=4021
R=tina.legrand@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/28069004

git-svn-id: 03ae4fbe531b1eefc9d815f31e49022782c42458@7723 4adac7df-926f-26a2-2b94-8c16560cd09d

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