Use hidl_string conversion constructor as test. am: 54813ed7c6 am: ec0bcf0a92 am: a81e95c52f
am: 261ab82a9e

Change-Id: I198f7dd423436a6f153a2a30b40065598e88b5f5
diff --git a/tests/foo/1.0/default/Foo.cpp b/tests/foo/1.0/default/Foo.cpp
index 235a12d..f855f21 100644
--- a/tests/foo/1.0/default/Foo.cpp
+++ b/tests/foo/1.0/default/Foo.cpp
@@ -68,10 +68,7 @@
         doStuffAndReturnAString_cb _cb) {
     ALOGI("SERVER(Foo) doStuffAndReturnAString");
 
-    hidl_string s;
-    s = "Hello, world";
-
-    _cb(s);
+    _cb("Hello, world");
 
     return Void();
 }