I am developing a carrier app (https://source.android.com/docs/core/connect/uicc) for managing configurations for operators/providers.
The issue is configuring WiFi / Cellular preference (RAT given preference) for call admission and call transfer.
After checking various Android APIs, I couldn't find any that would seem to suite the need. There is this configuration key for CarrierConfigManager https://developer.android.com/reference/android/telephony/CarrierConfigManager#KEY_CARRIER_DEFAULT_WFC_IMS_MODE_INT . But it does not seem to relate specifically to call admission or call transfer.
What would be the best API for this configuration if any exists?
