Fixes https://github.com/flutter/flutter/issues/89939 and updates the look of the Android context menu to match API 34.

## The problem
Before this PR, setting `surface` in the color scheme caused the background color of the Android context menu to change, but it wasn't possible to change the text color.

```dart
MaterialApp(
  theme: ThemeData(
    // Using a dark theme made the context menu text color be white.
    colorScheme: ThemeData.dark().colorScheme.copyWith(
      // Setting the surface here worked.
      surface: Colors.white,
      // But there was no way to set the text color. This didn't work.
      onSurface: Colors.black,
    ),
  ),
),
```

| Expected (after PR) | Actual (before PR) |
| --- | --- |
| <img width="239" alt="Screenshot 2023-08-07 at 11 45 37 AM" src="https://github.com/flutter/flutter/assets/389558/a9fb75e5-b6c3-4f8e-8c59-2021780c44a7"> | <img width="250" alt="Screenshot 2023-08-07 at 11 51 10 AM" src="https://github.com/flutter/flutter/assets/389558/a5abd2d2-49bb-47a0-836f-864d56af2f58"> |

## Other examples

<table>
<tr>
<th>Scenario</th>
<th>Result</th>
</tr>
<tr>
<td>

```dart
MaterialApp(
  theme: ThemeData(
    colorScheme: ThemeData.light(),
  ),
  ...
),
```

</td>
<td>
<img width="244" alt="Screenshot 2023-08-07 at 11 42 05 AM" src="https://github.com/flutter/flutter/assets/389558/74c6870b-5ff7-4b1a-9e0c-b2bb4809ef1e">
</td>
</tr>
<tr>
<td>

```dart
MaterialApp(
  theme: ThemeData(
    colorScheme: ThemeData.dark(),
  ),
  ...
),
```

</td>
<td>
<img width="239" alt="Screenshot 2023-08-07 at 11 42 23 AM" src="https://github.com/flutter/flutter/assets/389558/91fe32f8-bd62-4d9b-96e8-ae5a9a769745">
</td>
</tr>
<tr>
<td>

```dart
MaterialApp(
  theme: ThemeData(
    colorScheme: ThemeData.light().colorScheme.copyWith(
      surface: Colors.blue,
      onSurface: Colors.red,
    ),
  ),
  ...
),
```

</td>
<td>
<img width="240" alt="Screenshot 2023-08-07 at 11 43 06 AM" src="https://github.com/flutter/flutter/assets/389558/e5752f8b-3738-4391-9055-15c38bd4af21">
</td>
</tr>
<tr>
<td>

```dart
MaterialApp(
  theme: ThemeData(
    colorScheme: ThemeData.light().colorScheme.copyWith(
      surface: Colors.blue,
      onSurface: Colors.red,
    ),
  ),
  ...
),
```

</td>
<td>
<img width="244" alt="Screenshot 2023-08-07 at 11 42 47 AM" src="https://github.com/flutter/flutter/assets/389558/68cc68f0-b338-4d94-8810-d8e46fb1e48e">
</td>
</tr>
</table>