updateFormSettings changes selected behavioral settings.
Example
Inputs
form and settings are required. settings must provide isQuiz,
emailCollection (none, verified, or respondentInput), or both.
requiredRevisionId and account are optional.
Output
Returns the complete updatedForm. verified uses the signed-in identity;
respondentInput asks the respondent to enter an address. Provider restrictions
can apply to quizzes and existing question grading.