Add kAFF2 enabling the sending of AckFrequencyFrame upon handshake completion.

Protected by FLAGS_quic_reloadable_flag_quic_can_send_ack_frequency.

PiperOrigin-RevId: 337855733
Change-Id: I45e3c11605e37c01e217a7a86237f35cdfb806c9
diff --git a/quic/core/quic_sent_packet_manager_test.cc b/quic/core/quic_sent_packet_manager_test.cc
index 5504e8e..0ce3b43 100644
--- a/quic/core/quic_sent_packet_manager_test.cc
+++ b/quic/core/quic_sent_packet_manager_test.cc
@@ -4431,12 +4431,12 @@
 
   // Set up RTTs.
   auto* rtt_stats = const_cast<RttStats*>(manager_.GetRttStats());
-  rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(8),
+  rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(80),
                        /*ack_delay=*/QuicTime::Delta::Zero(),
                        /*now=*/QuicTime::Zero());
   // Make sure srtt and min_rtt are different.
   rtt_stats->UpdateRtt(
-      QuicTime::Delta::FromMilliseconds(16),
+      QuicTime::Delta::FromMilliseconds(160),
       /*ack_delay=*/QuicTime::Delta::Zero(),
       /*now=*/QuicTime::Zero() + QuicTime::Delta::FromMilliseconds(24));
 
@@ -4461,12 +4461,12 @@
 
   // Set up RTTs.
   auto* rtt_stats = const_cast<RttStats*>(manager_.GetRttStats());
-  rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(8),
+  rtt_stats->UpdateRtt(QuicTime::Delta::FromMilliseconds(80),
                        /*ack_delay=*/QuicTime::Delta::Zero(),
                        /*now=*/QuicTime::Zero());
   // Make sure srtt and min_rtt are different.
   rtt_stats->UpdateRtt(
-      QuicTime::Delta::FromMilliseconds(16),
+      QuicTime::Delta::FromMilliseconds(160),
       /*ack_delay=*/QuicTime::Delta::Zero(),
       /*now=*/QuicTime::Zero() + QuicTime::Delta::FromMilliseconds(24));