Remove ; from closing namespaces in libs/hwui

When closing a namespace a } is sufficient. It doesn't need to be };
like closing a class or enum.

Within frameworks/base/libs/hwui there is a mix between } and }; when
closing a namespace. There are even mixes between a .h and the
corresponding .cpp files.

In a separate CL I was asked to not close with };. That was a good
comment. I adopted the style from nearby code. This CL cleans up the
nearby code.

Test: I made sure the code still built as expected.
Change-Id: Ieb314a4f48d6e33752463f3be4361fdc9be97482
diff --git a/libs/hwui/renderthread/RenderProxy.h b/libs/hwui/renderthread/RenderProxy.h
index 6668c58..d9b789f 100644
--- a/libs/hwui/renderthread/RenderProxy.h
+++ b/libs/hwui/renderthread/RenderProxy.h
@@ -49,7 +49,7 @@
     Reset = 1 << 1,
     JankStats = 1 << 2,
 };
-};
+}
 
 /*
  * RenderProxy is strictly single threaded. All methods must be invoked on the owning