Native VoWiFi / IMS registration state

Please add a native Profile State and variable for IMS / Wi-Fi Calling registration status.

Useful values:
- IMS registered: true/false
- IMS transport: WLAN/IWLAN/WWAN/none
- VoWiFi active: true/false

Use case:
Trigger automations when VoWiFi drops while Wi-Fi is still connected, without polling dumpsys connectivity through ADB/Shizuku.

If Android does not allow this as a normal app permission, please consider supporting it through ADB Wifi, Shizuku, root, or a helper plugin.