fix audio no sound, add missing VideoFrame timestamp

move get_time to hbb_common

Signed-off-by: 21pages <pages21@163.com>

src/server/video_service.rs

@@ -601,7 +601,7 @@ fn create_msg(vp9s: Vec<EncodedVideoFrame>) -> Message {
         frames: vp9s.into(),
         ..Default::default()
     });
-    vf.timestamp = crate::common::get_time();
+    vf.timestamp = hbb_common::get_time();
     msg_out.set_video_frame(vf);
     msg_out
 }