Use -Werror in system/tools/aidl
am: 1560796621

Change-Id: I962469c66125d815f92c752ef385fa9b9ff09886
diff --git a/Android.bp b/Android.bp
index a38f4f6..0331c95 100644
--- a/Android.bp
+++ b/Android.bp
@@ -16,10 +16,10 @@
 
 cc_defaults {
     name: "aidl_defaults",
-    clang_cflags: [
+    cflags: [
         "-Wall",
-        "-Wextra",
         "-Werror",
+        "-Wextra",
     ],
     whole_static_libs: ["libgtest_prod"],
     static_libs: [