Merge "Add @RequiresFeature for VcnManager" into main

import android.annotation.IntDef;

import android.annotation.NonNull;

import android.annotation.Nullable;

import android.annotation.RequiresFeature;

import android.annotation.RequiresPermission;

import android.annotation.SystemApi;

import android.annotation.SystemService;

import android.content.Context;

import android.content.pm.PackageManager;

import android.net.LinkProperties;

import android.net.NetworkCapabilities;

import android.os.Binder;

 * tasks. In Safe Mode, the system will allow underlying cellular networks to be used as default.

 * Additionally, during Safe Mode, the VCN will continue to retry the connections, and will

 * automatically exit Safe Mode if all active tunnels connect successfully.

 *

 * <p>Apps targeting Android 15 or newer should check the existence of {@link

 * PackageManager#FEATURE_TELEPHONY_SUBSCRIPTION} before querying the service. If the feature is

 * absent, {@link Context#getSystemService} may return null.

 */

@SystemService(Context.VCN_MANAGEMENT_SERVICE)

@RequiresFeature(PackageManager.FEATURE_TELEPHONY_SUBSCRIPTION)

public class VcnManager {

    @NonNull private static final String TAG = VcnManager.class.getSimpleName();