Bruno Leroux 3455b8ab57
Update TextFormField restoration tests (#166678)
## Description

This PR updates TextFormField restoration tests:
- It adds a missing test, the one whose description is 'Textformfield
value is restorable'.
- It adds one test to replace two tests (and their corresponding helper
class) which were duplicated from TextField tests, see
https://github.com/flutter/flutter/blob/master/packages/flutter/test/material/text_field_restoration_test.dart

## Related Issue

Found while working on [Create
DropdownMenuFormField](https://github.com/flutter/flutter/issues/141941)

## Tests

Adds 2 tests.
Removes 2 tests.
2025-04-10 07:11:24 +00:00
..
2025-03-27 04:27:26 +00:00
2025-02-27 19:38:00 +00:00

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