Bug 958889 - Review comment: Catch getState, log, and return null.
Bug 958889 - Review comment: Get account email from Account rather than FxAccount.
Bug 958889 - Part 4: Move FxAccountSetupTask to fxa.tasks.
Bug 958889 - Part 5: Refactor *Task out from FxAccountSetupTask.
Bug 958889 - Part 6: Move resend code to FxAccountCodeResender from FxAccountConfirmAccountActivity.