Internal change

PiperOrigin-RevId: 343389838
Change-Id: I91336772932e7323b18f177d280d38a6e7c65802
Reviewed-on: https://chromium-review.googlesource.com/c/openscreen/+/2595722
Reviewed-by: Ryan Keane <rwkeane@google.com>
Commit-Queue: Ryan Keane <rwkeane@google.com>
diff --git a/cast/cast_core/api/common/runtime_metadata.proto b/cast/cast_core/api/common/runtime_metadata.proto
index 74a31fe..bb72541 100644
--- a/cast/cast_core/api/common/runtime_metadata.proto
+++ b/cast/cast_core/api/common/runtime_metadata.proto
@@ -50,4 +50,7 @@
     // capabilities for NATIVE runtime.
     ApplicationCapabilities native_application_capabilities = 2;
   }
+
+  // Flags if heartbeat is supported.
+  bool heartbeat_supported = 3;
 }