Implements the USE_AUTO_STUB setting in the Android frontend:
- Added USE_AUTO_STUB to BooleanSetting enum
- Added UI switch setting with description in SettingsItem
- Added setting to system settings section in SettingsFragmentPresenter
- Added string resources for setting title and description
The setting allows users to toggle automatic stubbing of missing services
and functions, which may improve compatibility at the cost of stability.
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