Internal bug: b/264211793.

This issue is copied from the above bug, filed by customer: money.

Steps to Reproduce

Hint text is announced with no input:

Hint text is announced with input:

Expected results:

When text is input in a text field, hint text is not expected to be announced in talk back mode.

Actual results:

Hint text is announced in talk back mode

Scaffold(
  appBar: AppBar(title: Text('Flutter Demo Home Page')),
  body: TextField(
    decoration: InputDecoration(hintText: 'Send a message...'),
  ),
)