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.cpp b/services/audiopolicy/service/AudioPolicyService.cpp
index 7af2e74..af0c823 100644
--- a/services/audiopolicy/service/AudioPolicyService.cpp
+++ b/services/audiopolicy/service/AudioPolicyService.cpp
@@ -1146,4 +1146,4 @@
 int aps_set_voice_volume(void *service, float volume, int delay_ms);
 };
 
-}; // namespace android
+} // namespace android