Refactor + enable GN check on video_coding_utility

To avoid the cyclic dependency

BUG=webrtc:6828
NOTRY=True
TBR=magjed@webrtc.org

Review-Url: https://codereview.webrtc.org/2717113002
Cr-Commit-Position: refs/heads/master@{#17116}
diff --git a/webrtc/modules/video_coding/video_coding_impl.h b/webrtc/modules/video_coding/video_coding_impl.h
index e4fff1e..a45105a 100644
--- a/webrtc/modules/video_coding/video_coding_impl.h
+++ b/webrtc/modules/video_coding/video_coding_impl.h
@@ -27,9 +27,9 @@
 #include "webrtc/modules/video_coding/generic_encoder.h"
 #include "webrtc/modules/video_coding/jitter_buffer.h"
 #include "webrtc/modules/video_coding/media_optimization.h"
+#include "webrtc/modules/video_coding/qp_parser.h"
 #include "webrtc/modules/video_coding/receiver.h"
 #include "webrtc/modules/video_coding/timing.h"
-#include "webrtc/modules/video_coding/utility/qp_parser.h"
 #include "webrtc/system_wrappers/include/clock.h"
 
 namespace webrtc {