Fix Binder warnings after C++ bump to 20

Bug: 311052584
Test: mma in binder folder
Change-Id: I716613dbdbf4b58b128106b893d051995bcc9d4a
diff --git a/libs/binder/tests/binderRpcTestCommon.h b/libs/binder/tests/binderRpcTestCommon.h
index a55edd2..62fe9e5 100644
--- a/libs/binder/tests/binderRpcTestCommon.h
+++ b/libs/binder/tests/binderRpcTestCommon.h
@@ -393,7 +393,7 @@
         }
 
         if (delayed) {
-            RpcMaybeThread([=]() {
+            RpcMaybeThread([=, this]() {
                 ALOGE("Executing delayed callback: '%s'", value.c_str());
                 Status status = doCallback(callback, oneway, false, value);
                 ALOGE("Delayed callback status: '%s'", status.toString8().c_str());