Description

In the Post editor, when switching fullscreen mode off and on via the keyboard shortcut, a snackbar notice appears and a speak message is sent to the ARIA live region but the message is the wrong one. It should be swapped.

Video to illustrate:

To my understanding, the notice was introduced in #66405

Step-by-step reproduction instructions

• Edit a post
• Use the fullscreen mode keyboard shortcut. On macOS it's Shift+Option+Command+F.
• Observe the snackbar notice says 'activated' when deactivating and 'deactivated' when activating.

Screenshots, screen recording, code snippet

No response

Environment info

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure