Add tcptype to Candidate toString method

[jalaziz]

No description provided.

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.

[jalaziz]

I also noticed Candidate doesn't take tcpType into account for equals. I didn't want to assume it was safe to add tcpType to equals(), since it could result in breaking code. However, I believe it's the right thing to do.

[jalaziz]

As it turns out, Chrome does not accept the tcptype attribute in the SDP string for SSLTCP. This results in some conflicts with Jitsi / ICE4J.