android10/system/sepolicy/public/hal_face.te

# Allow HwBinder IPC from client to server, and vice versa for callbacks.
binder_call(hal_face_client, hal_face_server)
binder_call(hal_face_server, hal_face_client)

hal_attribute_hwservice(hal_face, hal_face_hwservice)

# Allow access to the ion memory allocation device.
allow hal_face ion_device:chr_file r_file_perms;

# Allow read/write access to the face template directory.
allow hal_face face_vendor_data_file:file create_file_perms;
allow hal_face face_vendor_data_file:dir rw_dir_perms;