Bump webview_flutter from 3.0.4 to 4.4.2

[dependabot[bot]]

Bumps webview_flutter from 3.0.4 to 4.4.2.

Commits

• 8aef4b8 Fix mounted checks (#5305)
• f22ff36 [webview_flutter_wkwebview] Only set limitsNavigationsToAppBoundDomains whe...
• a66be0e [webview_flutter] [webview_flutter_wkwebview]Fix race condition in flaky test...
• c7008cf [webview_flutter_wkwebview] Fixes bug where `WebkitWebViewController.getUserA...
• 35732b6 [webview_flutter] Exposes missing JavaScriptLogLevel from platform interfac...
• c933398 [webview_flutter] Adds app facing implementation to override console log (#4705)
• f68661d [webview_flutter] Add a method for getting the user agent (#4472)
• 41a3ec2 [webview_flutter_android] Fix race condition in flaky test (#5037)
• b3138a6 [webview_flutter_android][webview_flutter_wkwebview] Adds support for `getUse...
• eac45de [webview_flutter_android] Adds Android implementation to override console log...
• Additional commits viewable in compare view

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