Add missing ',' in default jdwp argument list

We were incorrectly missing a ',' in the default jdwp argument list.
This meant that a manual -XjdwpProvider:adbconnection will fail due to
failing to parse the argument string.

Test: run app with wrap.sh that adds  '-XjdwpProvider:adbconnection -Xcompiler-option --debuggable'
      Attach debugger
Bug: 109505014

Change-Id: Id09e04cd92c2f89a4bcdf95b05071bacd509b286
diff --git a/adbconnection/adbconnection.cc b/adbconnection/adbconnection.cc
index d399c2a..ad94148 100644
--- a/adbconnection/adbconnection.cc
+++ b/adbconnection/adbconnection.cc
@@ -872,7 +872,7 @@
       (ContainsArgument(opts, "server=y") ? "" : "server=y,") +
       // See the comment above for why we need to be suspend=n. Since the agent defaults to
       // suspend=y we will add it if it wasn't already present.
-      (ContainsArgument(opts, "suspend=n") ? "" : "suspend=n") +
+      (ContainsArgument(opts, "suspend=n") ? "" : "suspend=n,") +
       "transport=dt_fd_forward,address=" + std::to_string(remote_agent_control_sock_);
 }