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/service/AudioPolicyService.h b/services/audiopolicy/service/AudioPolicyService.h
index 268697e..833a230 100644
--- a/services/audiopolicy/service/AudioPolicyService.h
+++ b/services/audiopolicy/service/AudioPolicyService.h
@@ -577,6 +577,6 @@
     audio_mode_t mPhoneState;
 };
 
-}; // namespace android
+} // namespace android
 
 #endif // ANDROID_AUDIOPOLICYSERVICE_H