namespace does not need a closing semicolon

Change-Id: Ie8f9d42fc061f6d558f23b98414e04eb3d14b376
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 9d0a5bc..8d34587 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -2183,4 +2183,4 @@
     mPausedNs = ns;
 }
 
-}; // namespace android
+} // namespace android