Internal: b/258261921

Currently, hint text can either be used to (1) provide hint text for users, or (2) as a label for the text field.
E.g. to enter phone number, hint text can be either (1) 0000 - 0000 or (2) Phone number.

For a11y users, the hint text is always read regardless of use case (1) or (2) and this is problematic for use case (1).

E.g. when the text field is filled with 1234 - 5678, it reads both the text and hint text "1234 - 5678, 0000 - 0000"

Can we tweak the current feature to exclude the hint from a11y if the textfield is not empty AND a dedicated label text is given?