Mobile: Fixes #10253: Move accessibility focus to first menu option once it opens

[Sidd-R]

Summary

On opening the note menu, moved the accessibility focus to the first item in it using AccessibilityInfo.setAccessibilityFocus

• Fixes Accessibility: Screen reader focus stays on the open menu button when the note actions menu is opened #10253

Rationale

1. added a ref to the first item in the note menu
2. when the onOpen event of the Menu is triggered, set the accessibility focus to first item using ref.
3. used setTimeout because the value of ref was initially null for a few milliseconds.

Demo

Screenrecorder-2024-04-19-10-04-26-301.mp4

Manual Testing

1. Enable TalkBack
2. Open a note
3. Focus the note actions button (top right of screen)
4. Activate it (double-tap), the focus should move to the first item on the menu
5. Move focus to the next item (swipe right), the focus goes to the second item on the menu

Tested successfully on android 13 physical device

[Sidd-R]

I tried moving menuComp to a separate component then using useEffect and a few other things but it did not work out, so resorted to using setTimeout in the end

[laurent22]

i will close this for now as there's unfortunately too many issues