public static String[] getApplicationProtocols(SSLSocket socket) {
        return toConscrypt(socket).getApplicationProtocols();
    }
Gets the application-layer protocols (ALPN) in prioritization order.

@param socket the socket
@return the protocols in descending order of preference, or an empty array if protocol
indications are not being used. Always returns a new array.
common/src/main/java/org/conscrypt/Conscrypt.java