Merge "Fix NPE when checking for user restriction sources." into main

                    UserHandle.USER_NULL, UserManager.RESTRICTION_SOURCE_SYSTEM));

        }

        result.addAll(getDevicePolicyManagerInternal()

                .getUserRestrictionSources(restrictionKey, userId));

        final DevicePolicyManagerInternal dpmi = getDevicePolicyManagerInternal();

        if (dpmi != null) {

            result.addAll(dpmi.getUserRestrictionSources(restrictionKey, userId));

        }

        return result;

    }