feature: Add built-in way to open Android Settings #5803

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Describe the requested feature

Example use cases:

• User clicks a button → open Wi-Fi settings
• Enable hotspot / tethering
• other settings on mobile
  which these feature are very easy for others to develop app in flet

add this package: https://pub.dev/packages/app_settings
as built in

Suggest a solution

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Additional details

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