Audio C++ comments

Change-Id: I84906ebb9dfcfa5b96b287d18364b407f02a30c1
diff --git a/include/private/media/AudioTrackShared.h b/include/private/media/AudioTrackShared.h
index 20abd51..046d5e9 100644
--- a/include/private/media/AudioTrackShared.h
+++ b/include/private/media/AudioTrackShared.h
@@ -59,8 +59,8 @@
 
     // The data members are grouped so that members accessed frequently and in the same context
     // are in the same line of data cache.
-                Mutex       lock;
-                Condition   cv;
+                Mutex       lock;           // sizeof(int)
+                Condition   cv;             // sizeof(int)
     volatile    uint32_t    user;
     volatile    uint32_t    server;
                 uint32_t    userBase;