gn2bp: Add _sanitize_args to WriteNativeLibrariesJavaSanitizer

Test: ./update_results.sh
Change-Id: I6658d5223b473bb4e29044458f97330628580e2b
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index f4df5e9..1ad4efb 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -914,7 +914,9 @@
     super()._sanitize_args()
 
 class WriteNativeLibrariesJavaSanitizer(BaseActionSanitizer):
-  pass
+  def _sanitize_args(self):
+    self._set_value_arg('--output', '$(out)')
+    super()._sanitize_args()
 
 def get_action_sanitizer(target, type):
   if target.script == "//build/write_buildflag_header.py":