device_phh_treble/sepolicy/qualcomm.te

#me.phh.treble.qti.audio is system-signed
allow system_app hal_telephony_hwservice:hwservice_manager { find };
allow { rild system_app } { rild system_app }:binder { call transfer };

#Pixel 1
type vnd_qcril_audio_hwservice, hwservice_manager_type;
allow system_app vnd_qcril_audio_hwservice:hwservice_manager { find };

#Pixel 2
type vnd_qcrilhook_hwservice, hwservice_manager_type;
allow system_app vnd_qcrilhook_hwservice:hwservice_manager { find };