Use "HWUI" LOG_TAG exclusively in libs/hwui/**

"OpenGLRenderer" is no longer accurate, and jreck@ has expressed a
desire to have all logging unified under one tag to allow for filtering,
as logcat is quite noisy.

Bug: N/A
Test: builds and *seems* to pass a quick "#ifndef LOG_TAG" check to
see if LOG_TAG is ever overridden outside of this Android.bp

Change-Id: I8b5413f20a85fb9615bd38778c3262790b7225bf
diff --git a/libs/hwui/jni/pdf/PdfUtils.cpp b/libs/hwui/jni/pdf/PdfUtils.cpp
index 06d2028..6887fda 100644
--- a/libs/hwui/jni/pdf/PdfUtils.cpp
+++ b/libs/hwui/jni/pdf/PdfUtils.cpp
@@ -16,14 +16,11 @@
 
 #include "PdfUtils.h"
 
-#include "jni.h"
 #include <nativehelper/JNIHelp.h>
+#include <utils/Log.h>
 
 #include "fpdfview.h"
-
-#undef LOG_TAG
-#define LOG_TAG "PdfUtils"
-#include <utils/Log.h>
+#include "jni.h"
 
 namespace android {