[A11y] Add debounce to screen reader announcements for SelectPanel

[khiga8]

Staff only: Slack thread

The built-in announcements for SelectPanel is missing a debounce. It appears to be firing after ever single key stroke resulting in a ton of duplicate messages fired consecutively. Video attached in slack thread -- can re-record when I find time later.

related code

[mustafajw07]

@khiga8 / @francinelucca Can i contribute for this feature?

[francinelucca]

assigned to you @mustafajw07. Feel free to open a PR!