This CL introduces a new fuzzer target neteq_rtp_fuzzer that manipulates the RTP header fields before inserting the packets into NetEq. A few helper classes are also introduced. BUG=webrtc:5447 NOTRY=True Review-Url: https://codereview.webrtc.org/2315633002 Cr-Commit-Position: refs/heads/master@{#14103}