Add Call Direction in sendPhoneCallEvents description to fix customPa…

[agent515]

…rams being null in Active Call on Answer.

Fixes #232

Call Direction is added to the Call Event log to satisfy tokens.length == 5 condition in parseCustomParams().

Map<String, dynamic>? parseCustomParams(List<String> tokens) {
  if (tokens.length != 5) return null;
  try {
    Map<String, dynamic> customValue = jsonDecode(tokens[4]);
    return customValue;
  } catch (error) {
    return null;
  }
}

[cybex-dev]

Thank you for the PR - will review and merge this week.