整理命名空间 (#1409)

* feat: remove using namespace mediakit in header files.

(cherry picked from commit d44aeb339a8a0e1f0455be82b21fe4b1b536299f)

* feat: remove using namespace mediakit in FFmpegSource.h

* feat: remove using namespace mediakit in RtpExt.h

* feat: remove using namespace mediakit in header files.

* feat: remove using namespace std in header files.

* feat: remove using namespace std in header files when zltoolkit remove std in header

* 补充命名空间

* 整理命名空间

* 整理命名空间2

* 修复macos ci

* 修复编译问题

* 修复编译问题2

* 修复编译问题3

Co-authored-by: Johnny <hellojinqiang@gmail.com>
Co-authored-by: Xiaofeng Wang <wasphin@gmail.com>

player/test_player.cpp

@@ -116,7 +116,7 @@ int main(int argc, char *argv[]) {
         WarnL << "play shutdown: " << ex.what();
     });
 
-    (*player)[kRtpType] = atoi(argv[2]);
+    (*player)[Client::kRtpType] = atoi(argv[2]);
     //不等待track ready再回调播放成功事件，这样可以加快秒开速度
     (*player)[Client::kWaitTrackReady] = false;
     player->play(argv[1]);