`iframe` element with title attribute

Pass Criteria

#1: Element is supported
#2: Correct HTML and Core Accessibility API mappings
#3: Correct Accessible Name & Description Calculation

Reference

Test if-003: `iframe` element with `title` attribute

Test if-004: `iframe` element with `title=""` attribute

Test if-005: `iframe` element with `title=""` and `role="none"` attribute

Test if-006: `iframe` element with `title=""`, `role="none"` and `tabindex="-1"` attribute

Test if-007: `iframe` element with `title=""`, `role="none"`, `aria-roledescription=" "` and `tabindex="-1"` attribute