Add two new RTP header extensions to neteq_rtpplay
Add two new RTP header extensions to neteq_rtpplay

This change adds flags and default values for two more RTP header
extensions: VideoContentType and VideoTiming.

This will silence a number of annoying warnings when running with
application logs.

Bug: none
Change-Id: I9bb01ea2519813d3c47553ecff384141fbede23e
Reviewed-on: https://webrtc-review.googlesource.com/75300
Reviewed-by: Minyue Li <102e225d2aadac8dd4015cd04db7d6cd89bdb304@webrtc.org>
Commit-Queue: Henrik Lundin <b9599afb29b1fa4305dba8bb04f760bf0c9c9471@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#23178}
TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc