resources/video/timing/simulator

A set of RtcEventLog's recorded using chrome://webrtc-internals:

• video_recv_vp8_pt96: Receiving a single stream of VP8 on payload type 96.
• video_recv_vp9_pt98: Receiving a single stream of VP9 on payload type 98.
• video_recv_av1_pt45: Receiving a single stream of AV1 on payload type 45.
• video_recv_sequential_join_vp8_vp9_av1: Sequential join of three remote streams, with codecs and payload types as above.