Webview dont load for Android with new flutter version

## System info

Issue occurs on: Android
Plugin version: 0.4.0
Flutter doctor output:

```
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.24.0, on macOS 13.6.1 22G313 darwin-x64, locale pt-BR)
[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
[!] Xcode - develop for iOS and macOS (Xcode 15.0.1)
! CocoaPods 1.11.2 out of date (1.13.0 is recommended).
CocoaPods is a package manager for iOS or macOS platform code.
Without CocoaPods, plugins will not work on iOS or macOS.
For more info, see https://flutter.dev/to/platform-plugins
To update CocoaPods, see https://guides.cocoapods.org/using/getting-started.html#updating-cocoapods
[✓] Chrome - develop for the web
[✓] Android Studio (version 2020.3)
[✓] VS Code (version 1.92.1)
[✓] Connected device (3 available)
[✓] Network resources
```

## Steps to Reproduce

I upgraded Flutter to the latest stable version (Flutter 3.24.0 • channel stable).
Then created a new default flutter project and installed the plugin.

When I click to open the webview (any of them) I get the error:

E/flutter (15045): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: MissingPluginException(No implementation found for method launch on channel flutter_webview_plugin)
E/flutter (15045): #0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:332:7)
E/flutter (15045):
E/flutter (15045): #1 FlutterWebviewPlugin.launch (package:flutter_webview_plugin/src/base.dart:217:5)
E/flutter (15045):
E/flutter (15045):

It works fine with IOS.
commands like 'flutter clean run' or deleting pubspec.lock didn't work.

## Logs

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Tái hiện lỗi trong một Flutter project mới bằng Flutter 3.24.0 và Android plugin. Bắt đầu tại FlutterWebviewPlugin.launch trong flutter_webview_plugin/src/base.dart:217 và lần theo method channel flutter_webview_plugin đến phần triển khai Android. Hoàn tất khi có thể khởi chạy bất kỳ webview nào trên Android mà không gặp MissingPluginException.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.