Enforce that trust agents declare the BIND_TRUST_AGENT permission

package android.service.trust;

import android.Manifest;

import android.annotation.SdkConstant;

import android.app.Service;

import android.content.ComponentName;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.content.pm.ServiceInfo;

import android.os.Handler;

import android.os.IBinder;

import android.os.RemoteException;

import android.util.Log;

import android.util.Slog;

/**

        };

    };

    @Override

    public void onCreate() {

        super.onCreate();

        ComponentName component = new ComponentName(this, getClass());

        try {

            ServiceInfo serviceInfo = getPackageManager().getServiceInfo(component, 0 /* flags */);

            if (!Manifest.permission.BIND_TRUST_AGENT.equals(serviceInfo.permission)) {

                throw new IllegalStateException(component.flattenToShortString()

                        + " is not declared with the permission "

                        + "\"" + Manifest.permission.BIND_TRUST_AGENT + "\"");

            }

        } catch (PackageManager.NameNotFoundException e) {

            Log.e(TAG, "Can't get ServiceInfo for " + component.toShortString());

        }

    }

    /**

     * Called when the user attempted to authenticate on the device.

     *

      <service

          android:name=".SampleTrustAgent"

          android:label="@string/app_name"

          android:permission="android.permission.BIND_TRUST_AGENT"

          android:exported="true">

        <intent-filter>

          <action android:name="android.service.trust.TrustAgentService" />