Enable cpplint for webrtc/video_engine

Enable cpplint and have it use a whitelist that also checks
in subdirectories.

Move the cpplint check so it runs before the pylint check
since that one always run and increases the time to errors
for cpplint.

Fix all cpplint errors in webrtc/video_engine.

BUG=webrtc:5149
TESTED=Fixed issues reported by:
find webrtc/video_engine -type f -name *.cc -o -name *.h | xargs cpplint.py
followed by 'git cl presubmit'.

R=pbos@chromium.org, phoglund@chromium.org
TBR=pbos@webrtc.org, phoglund@webrtc.org

Review URL: https://codereview.webrtc.org/1481723003 .

Cr-Commit-Position: refs/heads/master@{#10808}

webrtc/video_engine/stream_synchronization_unittest.cc

@@ -8,9 +8,10 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include <algorithm>
 #include <math.h>
 
+#include <algorithm>
+
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webrtc/video_engine/stream_synchronization.h"