trusty/gatekeeper/android.hardware.gatekeeper-service.trusty.xml

<manifest version="1.0" type="device">
    <hal format="aidl">
        <name>android.hardware.gatekeeper</name>
        <version>1</version>
        <interface>
            <name>IGatekeeper</name>
            <instance>default</instance>
        </interface>
    </hal>
</manifest>