utils: fix warnings for unused parameters

Change-Id: Ibfb755a30ba2923669060fe0aed019beecbe38a1
diff --git a/include/utils/Mutex.h b/include/utils/Mutex.h
index de6fb39..dd201c8 100644
--- a/include/utils/Mutex.h
+++ b/include/utils/Mutex.h
@@ -91,10 +91,10 @@
 inline Mutex::Mutex() {
     pthread_mutex_init(&mMutex, NULL);
 }
-inline Mutex::Mutex(const char* name) {
+inline Mutex::Mutex(__attribute__((unused)) const char* name) {
     pthread_mutex_init(&mMutex, NULL);
 }
-inline Mutex::Mutex(int type, const char* name) {
+inline Mutex::Mutex(int type, __attribute__((unused)) const char* name) {
     if (type == SHARED) {
         pthread_mutexattr_t attr;
         pthread_mutexattr_init(&attr);