[MaterialDatePicker] Talkback does not announce initially selected date as "selected"

Description: An initially selected date (e.g., a date set using MaterialDatePickerBuilder.datePicker().setSelection()) is not announced as "selected" when using Talkback. It is necessary for the user to interactively select a date at which point "selected" will be prepended to the announcement of the date. After that, Talkback will correctly announce the selected date.

• Expected behavior: Regardless of whether the date is initially selected or interactively selected, Talkback should announce "selected" when swiping to the selected date.

• Source code:

Add the following to an Activity's "onCreate" to build and show a date picker dialog :

var datePicker = MaterialDatePicker.Builder.datePicker().setSelection(Date().time).build()
.show(supportFragmentManager,"")

Note that when initially swiping to the selected date, it will not be announced as selected (see attached video).

• Android API version: 34

• Device: Pixel 5

• Material Library Version : com.google.android.material:material:1.9.0

https://github.com/material-components/material-components-android/assets/26826628/7a31c145-97e1-4a65-a354-473404d6dd6a

Riproduci il problema usando MaterialDatePicker.Builder.datePicker().setSelection(Date().time) su Android API 34 con TalkBack abilitato. Traccia il comportamento di accessibilità della selezione della data di MaterialDatePicker, quindi verifica che una data inizialmente selezionata venga annunciata come selezionata e che la selezione interattiva rimanga corretta.