fixing build for when HAVE_WEBRTC_VIDEO is not defined
fixing build for when HAVE_WEBRTC_VIDEO is not defined

In that configuration HAVE_WEBRTC_VIDEO is not defined so null_webrtc_video_engine.h gets included which unlike the real one does not include a required header.

Bug: webrtc:11926, webrtc:12187
Change-Id: I3f9df7a841ea6d9920dcb5b39a7386946c9e4341
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/193784
Reviewed-by: Erik Språng <3ab8c90c99d6dd7822e0fad803ab0211dd287ae5@webrtc.org>
Commit-Queue: Erik Språng <3ab8c90c99d6dd7822e0fad803ab0211dd287ae5@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#32683}

TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc