Enable IETF QUIC 0-RTT flag for Interop.

No production change. not protected.

PiperOrigin-RevId: 314644646
Change-Id: I2039241f60c747d332f54614ee7153082f6153bb

quic/core/quic_versions.cc

diff --git a/quic/core/quic_versions.cc b/quic/core/quic_versions.cc
index 5db61bf..0bbc1b8 100644
--- a/quic/core/quic_versions.cc
+++ b/quic/core/quic_versions.cc
@@ -660,6 +660,7 @@
 
 void QuicVersionInitializeSupportForIetfDraft() {
   // Enable necessary flags.
+  SetQuicReloadableFlag(quic_enable_zero_rtt_for_tls, true);
 }
 
 void QuicEnableVersion(ParsedQuicVersion parsed_version) {