Freeze mdns_aidl_interface

All AIDL interfaces need to be a stable version in release branch.

Bug: 298594687
Test: m
Change-Id: Ia81eb29214f3ff76ca21c3ac098d26c4e8d9440d
diff --git a/staticlibs/netd/Android.bp b/staticlibs/netd/Android.bp
index ecaae32..2b7e620 100644
--- a/staticlibs/netd/Android.bp
+++ b/staticlibs/netd/Android.bp
@@ -246,6 +246,12 @@
             version: "1",
             imports: [],
         },
+        {
+            version: "2",
+            imports: [],
+        },
+
     ],
+    frozen: true,
 
 }