Cannot close the shield when VO is on

[JuliannaR]

Accessibility

Scenario to reproduce

Then the shield is open you cannot double tap on the arrow in the right corner to close, no gesture allows you to change screens. Tapping near the arrow opens the how it works screens.

Expected result

To be able to close the shield and return to the content underneath.

Bug or issue / WCAG

2.5.1: Pointer Gestures
https://www.w3.org/WAI/WCAG21/Understanding/pointer-gestures.html

Screenshots available

Device + OS

iPhone 8 | 13.5.1

[henrytao-me]

Note: the reason for this is here https://github.com/CovidShield/mobile/blob/master/src/components/BottomSheet/SheetContentsContainer.tsx#L24. SheetContentsContainer wraps all BottomSheet content (both collapsed and expanded content) in a TouchableHighlight with accessibility in it. This setup works for Android but not iOS.