Remove deprecated property `window` from `dart:ui`

[Nidal-Bakir]

New Issue Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.
• I can reproduce the issue with the latest version of Parse Server and the Parse Flutter SDK.

Issue Description

The window property from dart:ui is deprecated and should not be used.

This property is used in the Parse Flutter SDK in the parse_server_sdk_flutter.dart source file.

Parse-SDK-Flutter/packages/flutter/lib/parse_server_sdk_flutter.dart

Lines 80 to 81 in 319d4c3

	locale: locale ??
	(sdk.parseIsWeb ? ui.window.locale.toString() : Platform.localeName),

Steps to reproduce

1. Install Flutter 3.10.0/Dart 3
2. run the following command: flutter analyze --no-fatal-infos

You should see something like this:

Analyzing flutter...

info • 'window' is deprecated and shouldn't be used. Look up the current FlutterView from the context via View.of(context) or consult the PlatformDispatcher directly instead.
Deprecated to prepare for the upcoming multi-window support. This feature was deprecated after v3.7.0-32.0.pre • lib/parse_server_sdk_flutter.dart:82:17 •
deprecated_member_use

1 issue found. (ran in 3.5s)

Actual Outcome

Analyzing flutter...

info • 'window' is deprecated and shouldn't be used. Look up the current FlutterView from the context via View.of(context) or consult the PlatformDispatcher directly instead.
Deprecated to prepare for the upcoming multi-window support. This feature was deprecated after v3.7.0-32.0.pre • lib/parse_server_sdk_flutter.dart:82:17 •
deprecated_member_use

1 issue found. (ran in 3.5s)

Expected Outcome

Analyzing flutter...
No issues found! (ran in 2.5s)

Environment

Parse Flutter SDK

• SDK version: 4.0.0
• Flutter version: 3.10.0
• Dart version: 3
• Operating system version: Ubuntu 22.04.2 LTS x86_64

Server

• Parse Server version: N/A

Logs

[parse-github-assistant]

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