gfe-relnote: Add a ScopedPacketFlusher when the undecryptable packets alarm fire in case any packets are queued in the generator.

PiperOrigin-RevId: 239857802
Change-Id: Ie5d2db4a420a8a2f94bd4949fe4964c684f9d23f

quic/core/quic_connection.cc

diff --git a/quic/core/quic_connection.cc b/quic/core/quic_connection.cc
index 2c7df67..24cbb6d 100644
--- a/quic/core/quic_connection.cc
+++ b/quic/core/quic_connection.cc
@@ -201,7 +201,11 @@
   ProcessUndecryptablePacketsAlarmDelegate& operator=(
       const ProcessUndecryptablePacketsAlarmDelegate&) = delete;
 
-  void OnAlarm() override { connection_->MaybeProcessUndecryptablePackets(); }
+  void OnAlarm() override {
+    QuicConnection::ScopedPacketFlusher flusher(connection_,
+                                                QuicConnection::NO_ACK);
+    connection_->MaybeProcessUndecryptablePackets();
+  }
 
  private:
   QuicConnection* connection_;