Fix TimePicker hour and minute inputs are resized on error

[TahaTesser]

Fixes Defining inputDecorationTheme in TimePickerThemeData Causes Misalignment of Hour and Minute Input Boxes

Code sample

expand to view the code sample

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        timePickerTheme: const TimePickerThemeData(
          inputDecorationTheme: InputDecorationTheme(),
        ),
      ),
      home: Scaffold(
        body: Center(
          child: Builder(builder: (BuildContext context) {
            return ElevatedButton(
              onPressed: () async {
                await showTimePicker(
                  context: context,
                  initialEntryMode: TimePickerEntryMode.input,
                  initialTime: TimeOfDay.now(),
                );
              },
              child: const Text('Show Time Picker'),
            );
          }),
        ),
      ),
    );
  }
}

Before

After

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the Flutter Style Guide, including Features we expect every widget to implement.
• I signed the CLA.
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is test-exempt.
• I followed the breaking change policy and added Data Driven Fixes where supported.
• All existing and new tests are passing.

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[gspencergoog]

Thanks for fixing that, Taha!