Problem :-

On expanding the stacked snackbars, the scrim comes into focus. Talkback announces it as "Unlabeled - Double Tap to Activate". We need to update the string announced.

Root cause :-

There is no semantic content description present in Scrim in order for talkback to recite, hence reciting "Unlabeled".

Fix :-

Added the string resource and created a descriptive string for Scrim.

Validations:-

Build successful and behaviour is working as expected.

(how the change was tested, including both manual and automated tests)

Screenshots

Pull request checklist

This PR has considered:

• Light and Dark appearances
• Automated Tests
• Documentation and demo app examples
• VoiceOver and Keyboard Accessibility
• Internationalization and RTL layouts
• Size classes and window sizes (notched devices, multitasking, different window sizes, etc)