Add XR_META_detached_controllers

[plrepin]

For XR_META_simultaneous_hands_and_controllers to work properly, you need to implement XR_META_detached_controllers to simultaneously monitor both controllers and hands. At the moment, parallel tracking of one hand and the controller is implemented. And if the tracking of the controller is lost, then the hand replaces the controller, which can cause inappropriate functionality in games.
XR_META_detached_controllers is required to implement full functionality. This will allow you to track the position of the controllers regardless of hand tracking. In this way, the controllers can be a parallel input source along with the hands.

[m4gr3d]

@devloglogan Can you look into implementing this extension.

Adding the documentation page for reference: https://developers.meta.com/horizon/documentation/native/android/native-multimodal/

[plrepin]

@devloglogan should we expect this in the 5.x branch?