Add missing assert.h for win no-test build

Add some missing `#include <assert.h>` for Windows build when compiling
without RTC tests (rtc_include_tests = false) with the MSVC compiler
(is_clang=false, use_lld=false).

Bug: None
Change-Id: Ie9861100efeae87f4c4e29303d62293ad541125a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158533
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Commit-Queue: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29811}
diff --git a/audio/channel_receive.cc b/audio/channel_receive.cc
index e19a49d..502818f 100644
--- a/audio/channel_receive.cc
+++ b/audio/channel_receive.cc
@@ -10,6 +10,8 @@
 
 #include "audio/channel_receive.h"
 
+#include <assert.h>
+
 #include <algorithm>
 #include <map>
 #include <memory>
diff --git a/modules/video_capture/windows/device_info_ds.cc b/modules/video_capture/windows/device_info_ds.cc
index 9ad0759..5018f52 100644
--- a/modules/video_capture/windows/device_info_ds.cc
+++ b/modules/video_capture/windows/device_info_ds.cc
@@ -10,6 +10,7 @@
 
 #include "modules/video_capture/windows/device_info_ds.h"
 
+#include <assert.h>
 #include <dvdmedia.h>
 
 #include "modules/video_capture/video_capture_config.h"
diff --git a/test/rtp_file_reader.cc b/test/rtp_file_reader.cc
index 9454d6f..336beff 100644
--- a/test/rtp_file_reader.cc
+++ b/test/rtp_file_reader.cc
@@ -10,6 +10,7 @@
 
 #include "test/rtp_file_reader.h"
 
+#include <assert.h>
 #include <stdio.h>
 
 #include <map>