The editTextStyle is now implicitly set to Widget.AppCompat.EditText.
The background for this change is that all EditTexts in the theme were getting the filled box text field set on it rather than Widget.AppCompat.EditText. Because the TextInputEditText style is set via a ThemeOverlay, simply setting the correct style on the TextInputEditText wouldn't remove the attributes set in the filled box ThemeOverlay. This commit sets textInputStyle to Widget.Design.TextInputLayout to work around that.
This commit also adds a legacy text field demo. This should help ensure that the pre-existing text field isn't changed as a result of other modifications to the text field.
PiperOrigin-RevId: 198758642
