[DisplayServer] Implement has_hardware_keyboard method for Android and iOS.

[bruvzg]

No description provided.

[Calinou]

For context, this is needed to resolve #88235 in a way that doesn't harm usability when a physical keyboard is connected.

[syntaxerror247]

Just tested it on android and it is working properly.

[akien-mga]

Is this something that can be implemented for Web too, when using it on mobile devices?

[WhalesState]

Is this something that can be implemented for Web too, when using it on mobile devices?

If we use this to return from (LineEdit/TextEdit) show_virtual_keyboard when DisplayServer::get_singleton()->has_hardware_keyboard() is true, it will never show the virtual keyboard on Web (android/ios) since it will always return true on Web.

[akien-mga]

Yeah I'm fine merging this to have the feature for platforms that support it, but we need to be very careful before we rely on it for engine functionality. There are also Windows or Linux tablets with virtual keyboards where this would return true currently, even if no hardware keyboard is attached.

[akien-mga]

Thanks!