binder: add setOnUnlinked test

Bug: 181971563
Bug: 197721058
Test: this commit adds a test
Change-Id: Ia8804a060502598e7e9995d560e5b99f010c0be4
diff --git a/tests/tests/binder_ndk/libbinder_ndk_test/test_ibinder.cpp b/tests/tests/binder_ndk/libbinder_ndk_test/test_ibinder.cpp
index 65862b1..343a224 100644
--- a/tests/tests/binder_ndk/libbinder_ndk_test/test_ibinder.cpp
+++ b/tests/tests/binder_ndk/libbinder_ndk_test/test_ibinder.cpp
@@ -463,6 +463,8 @@
 
   // Does not crash
   AIBinder_DeathRecipient_delete(nullptr);
+  AIBinder_DeathRecipient_setOnUnlinked(recipient, nullptr);
+  AIBinder_DeathRecipient_setOnUnlinked(nullptr, nullptr);
 
   AIBinder_DeathRecipient_delete(recipient);
   AIBinder_decStrong(binder);