Add 'stubs' to libbinder_ndk

In order to exclude libbinder_ndk.so from the apex.

Test: build and check if libbinder_ndk.so is excluded in the media apex
Bug: 112766425
Change-Id: I8e0efaf572c5c1eaba979a54f6522f7452093067
diff --git a/libs/binder/ndk/Android.bp b/libs/binder/ndk/Android.bp
index d799c5f..dc4e000 100644
--- a/libs/binder/ndk/Android.bp
+++ b/libs/binder/ndk/Android.bp
@@ -40,6 +40,10 @@
     ],
 
     version_script: "libbinder_ndk.map.txt",
+    stubs: {
+        symbol_file: "libbinder_ndk.map.txt",
+        versions: ["29"],
+    },
 }
 
 ndk_headers {