customParams field in Active Call is null on Answer event.

[agent515]

Issue Summary

Active Call has a field customParams which contains extraOptions passed during a Twilio Call. If it's passed, customParams has a non-null value on Ringing event which is correct. But it is null on Answer event.

Steps to Reproduce

1. Receive a Twilio Call with non-null customParams
2. Answer the call
3. Get Active Call by calling TwilioVoice.instance.call.activeCall and check customParams value.

Any other relevant information. For example, why do you consider this a bug and what did you expect to happen instead?

I expect to get a similar customParams value of Active on both Ringing and Answer events.