Remove all LOG(DEBUG) which is not intended to be checked in

Bug: 14632493
Change-Id: Id9da8b87798af0a1b2bd2c178133e5f1ba47d43d
diff --git a/runtime/jdwp/jdwp_main.cc b/runtime/jdwp/jdwp_main.cc
index f480256..2419ca6 100644
--- a/runtime/jdwp/jdwp_main.cc
+++ b/runtime/jdwp/jdwp_main.cc
@@ -573,7 +573,7 @@
  */
 int64_t JdwpState::LastDebuggerActivity() {
   if (!Dbg::IsDebuggerActive()) {
-    LOG(DEBUG) << "no active debugger";
+    LOG(WARNING) << "no active debugger";
     return -1;
   }