Fix: TalkBack silent when focus moves to Cancel/Send button group

[ashishkadam0]

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Description

When TalkBack focus moved to the button group container (containing Cancel/Send or Cancel/Close buttons), the screen
reader announced nothing. Only after swiping further did individual buttons get announced.
The button group

container had no role or aria-label attribute. TalkBack focused the container but had nothing
to announce, resulting in a silent/dead region for screen reader users.

Solution Proposed

Added role="group" and aria-label="Actions" to the button group container in both InputValidationPane (email
transcript dialog) and ConfirmationPane (close chat dialog).

Acceptance criteria

Define what are the conditions to consider the PR has achieved the intended goal

Test cases and evidence

1. Screenshots
2. Manual TalkBack test — verified on device using talkback-test-before.html (silent) vs talkback-test.html (announces
   "Actions, group")

Sanity Tests

• You have tested all changes in Popout mode
• You have tested all changes in cross browsers i.e Edge, Chrome, Firefox, Safari and mobile devices(iOS and Android)
• Your changes are included in the CHANGELOG

A11y

• You have run the Automated Accessibility Check and have no reported issues