In quic, bundle server initial crypto data with initial ack. protected by gfe2_reloadable_flag_quic_bundle_crypto_data_with_initial_ack. This is used to speed up handshake since INITIAL ACK will be padded to full anyway. PiperOrigin-RevId: 317176505 Change-Id: I5444372466c64cdc662792333916d74b08e8b594