Remove redundant semicolon from namespace closing

Change-Id: I163f9d3d216c283ae1160ce4802e5247cf44fba7
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index fa0beaa..8329be4 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -2182,4 +2182,4 @@
     mProxy->releaseBuffer(buffer);
 }
 
-}; // namespace android
+} // namespace android