Use __ANDROID__ instead of HAVE_ANDROID_OS.

Change-Id: I9967f3fd758c2a5b40be5b60ae72be7e2fb75136
diff --git a/include/utils/Trace.h b/include/utils/Trace.h
index 6ee343d..6ba68f6 100644
--- a/include/utils/Trace.h
+++ b/include/utils/Trace.h
@@ -17,7 +17,7 @@
 #ifndef ANDROID_TRACE_H
 #define ANDROID_TRACE_H
 
-#ifdef HAVE_ANDROID_OS
+#if defined(__ANDROID__)
 
 #include <fcntl.h>
 #include <stdint.h>
@@ -59,11 +59,11 @@
 
 }; // namespace android
 
-#else // HAVE_ANDROID_OS
+#else // !__ANDROID__
 
 #define ATRACE_NAME(...)
 #define ATRACE_CALL()
 
-#endif // HAVE_ANDROID_OS
+#endif // __ANDROID__
 
 #endif // ANDROID_TRACE_H