Add quic::ProofSource::TicketCrypter interface The ProofSource::TicketCrypter interface will be used by TlsServerHandshaker to encrypt and decrypt session tickets. This is needed to support TLS session resumption and 0-RTT in QUIC. gfe-relnote: add unused method to quic::ProofSource interface PiperOrigin-RevId: 308132437 Change-Id: I1176369e1b3d286d299303aec07d46292fddf982