Check permissions on xiaomi device with a version below api 23

Question

As you know, Xiaomi devices have their own system of permissions. I'm testing my application on the device xiaomi redmi 3, api 22, android 5.1.1. I want to check if there is permission to access the camera and audio. But the standard way does not work:

ContextCompat.checkSelfPermission(getActivity().getApplicationContext(), "android.permission.CAMERA");

returns 0, although this is not true.

I found another way, but it also does not work correctly:

boolean b = hasSelfPermissionForXiaomi(getActivity(),"android.permission.CAMERA");

    private boolean hasSelfPermissionForXiaomi(Context context,String permission){
    String permissionTop = AppOpsManagerCompat.permissionToOp(permission);
    if(permissionTop == null){
        // not dangerous
        return true;
    }
    int noteOp = AppOpsManagerCompat.noteOp(context,permissionTop, Process.myUid(),context.getPackageName());
    return noteOp == AppOpsManagerCompat.MODE_ALLOWED && checkSelfPermission(context,permission) == PackageManager.PERMISSION_GRANTED;
}

b = true, although this is not true.

Guys, did any of you understand how to check permissions on xiaomi devices ???