Fix misc-macro-parentheses warnings in cts.

Add parentheses around macro arguments used beside operators.
Use 'aoto' type to avoid clang-tidy warnings of missing parentheses
of 'TYPE *'.

Bug: 28705665
Change-Id: I5d2c3b2bdfb7775200f31a011758b9a35b14794d
diff --git a/tests/cts/net/jni/NativeMultinetworkJni.c b/tests/cts/net/jni/NativeMultinetworkJni.c
index ad56b51..6990efa 100644
--- a/tests/cts/net/jni/NativeMultinetworkJni.c
+++ b/tests/cts/net/jni/NativeMultinetworkJni.c
@@ -30,7 +30,7 @@
 #include <sys/time.h>
 #include <android/multinetwork.h>
 
-#define UNUSED(X) ((void) X)
+#define UNUSED(X) ((void) (X))
 
 static const char kHostname[] = "connectivitycheck.android.com";