audiopolicy: Remove ; after namespace bracket

Semicolons are not needed after the closing bracket of
a namespace, remove it.

Test: compiles
Change-Id: Ie82930365f738fd9c95a9163839a68b772e49d95
diff --git a/services/audiopolicy/engineconfigurable/src/Engine.h b/services/audiopolicy/engineconfigurable/src/Engine.h
index bc5e035..328d23d 100644
--- a/services/audiopolicy/engineconfigurable/src/Engine.h
+++ b/services/audiopolicy/engineconfigurable/src/Engine.h
@@ -194,7 +194,7 @@
     AudioPolicyManagerObserver *mApmObserver;
 };
 
-}; // namespace audio_policy
+} // namespace audio_policy
 
-}; // namespace android
+} // namespace android