Accessibility: Talkback does not access content within a dialog that contains no interactive content

After going through the talkback portion of #23773, we found a bug with dialogs that do not have interactive content. This issue is to track the progress of the bug filed in google's issuetracker. 

[link to issuetracker](https://issuetracker.google.com/issues/243456562)