hidl_test: do not use Return for app errors.

Test: hidl_test
Bug: 31348667
Change-Id: Icc7e926bbb886b040fdea0ff9dee8bedad0860e7
diff --git a/tests/inheritance/1.0/default/Fetcher.cpp b/tests/inheritance/1.0/default/Fetcher.cpp
index 28dffaa..74f8d07 100644
--- a/tests/inheritance/1.0/default/Fetcher.cpp
+++ b/tests/inheritance/1.0/default/Fetcher.cpp
@@ -23,7 +23,7 @@
     if (sendRemote) {
         toSend = IChild::getService("child");
         if (!toSend->isRemote()) {
-            return Status::fromExceptionCode(Status::EX_ILLEGAL_STATE);
+            toSend = nullptr;
         }
     } else {
         toSend = local;