java/com/android/voicemail/impl/ActivationTask.java - platform/packages/apps/Dialer - Gitiles

 /*
  * Copyright (C) 2016 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License
  */

 package com.android.voicemail.impl;

 import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
 import android.provider.Settings;
 import android.support.annotation.Nullable;
 import android.support.annotation.VisibleForTesting;
 import android.support.annotation.WorkerThread;
 import android.telecom.PhoneAccountHandle;
 import android.telephony.ServiceState;
 import android.telephony.TelephonyManager;
 import com.android.dialer.logging.DialerImpression;
 import com.android.dialer.proguard.UsedByReflection;
 import com.android.voicemail.VoicemailClient;
 import com.android.voicemail.impl.protocol.VisualVoicemailProtocol;
 import com.android.voicemail.impl.scheduling.BaseTask;
 import com.android.voicemail.impl.scheduling.RetryPolicy;
 import com.android.voicemail.impl.settings.VisualVoicemailSettingsUtil;
 import com.android.voicemail.impl.sms.StatusMessage;
 import com.android.voicemail.impl.sms.StatusSmsFetcher;
 import com.android.voicemail.impl.sync.SyncTask;
 import com.android.voicemail.impl.sync.VvmAccountManager;
 import com.android.voicemail.impl.utils.LoggerUtils;
 import java.io.IOException;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeoutException;

 /**
  * Task to activate the visual voicemail service. A request to activate VVM will be sent to the
  * carrier, which will respond with a STATUS SMS. The credentials will be updated from the SMS. If
  * the user is not provisioned provisioning will be attempted. Activation happens when the phone
  * boots, the SIM is inserted, signal returned when VVM is not activated yet, and when the carrier
  * spontaneously sent a STATUS SMS.
  */
 @TargetApi(VERSION_CODES.O)
 @UsedByReflection(value = "Tasks.java")
 public class ActivationTask extends BaseTask {

   private static final String TAG = "VvmActivationTask";

   private static final int RETRY_TIMES = 4;
   private static final int RETRY_INTERVAL_MILLIS = 5_000;

   @VisibleForTesting static final String EXTRA_MESSAGE_DATA_BUNDLE = "extra_message_data_bundle";

   private final RetryPolicy retryPolicy;

   @Nullable private OmtpVvmCarrierConfigHelper configForTest;

   private Bundle messageData;

   public ActivationTask() {
     super(TASK_ACTIVATION);
     retryPolicy = new RetryPolicy(RETRY_TIMES, RETRY_INTERVAL_MILLIS);
     addPolicy(retryPolicy);
   }

   /** Has the user gone through the setup wizard yet. */
   private static boolean isDeviceProvisioned(Context context) {
     return Settings.Global.getInt(
             context.getContentResolver(), Settings.Global.DEVICE_PROVISIONED, 0)
         == 1;
   }

   /**
    * @param messageData The optional bundle from {@link android.provider.VoicemailContract#
    *     EXTRA_VOICEMAIL_SMS_FIELDS}, if the task is initiated by a status SMS. If null the task
    *     will request a status SMS itself.
    */
   public static void start(
       Context context, PhoneAccountHandle phoneAccountHandle, @Nullable Bundle messageData) {
     if (!isDeviceProvisioned(context)) {
       VvmLog.i(TAG, "Activation requested while device is not provisioned, postponing");
       // Activation might need information such as system language to be set, so wait until
       // the setup wizard is finished. The data bundle from the SMS will be re-requested upon
       // activation.
       DeviceProvisionedJobService.activateAfterProvisioned(context, phoneAccountHandle);
       return;
     }

     Intent intent = BaseTask.createIntent(context, ActivationTask.class, phoneAccountHandle);
     if (messageData != null) {
       intent.putExtra(EXTRA_MESSAGE_DATA_BUNDLE, messageData);
     }
     context.sendBroadcast(intent);
   }

   @Override
   public void onCreate(Context context, Bundle extras) {
     super.onCreate(context, extras);
     messageData = extras.getParcelable(EXTRA_MESSAGE_DATA_BUNDLE);
   }

   @Override
   public Intent createRestartIntent() {
     LoggerUtils.logImpressionOnMainThread(
         getContext(), DialerImpression.Type.VVM_AUTO_RETRY_ACTIVATION);
     Intent intent = super.createRestartIntent();
     // mMessageData is discarded, request a fresh STATUS SMS for retries.
     return intent;
   }

   @Override
   @WorkerThread
   public void onExecuteInBackgroundThread() {
     Assert.isNotMainThread();
     LoggerUtils.logImpressionOnMainThread(
         getContext(), DialerImpression.Type.VVM_ACTIVATION_STARTED);
     PhoneAccountHandle phoneAccountHandle = getPhoneAccountHandle();
     if (phoneAccountHandle == null) {
       // This should never happen
       VvmLog.e(TAG, "null PhoneAccountHandle");
       return;
     }

     PreOMigrationHandler.migrate(getContext(), phoneAccountHandle);

     OmtpVvmCarrierConfigHelper helper;
     if (configForTest != null) {
       helper = configForTest;
     } else {
       helper = new OmtpVvmCarrierConfigHelper(getContext(), phoneAccountHandle);
     }
     if (!helper.isValid()) {
       VvmLog.i(TAG, "VVM not supported on phoneAccountHandle " + phoneAccountHandle);
       VvmAccountManager.removeAccount(getContext(), phoneAccountHandle);
       return;
     }

     if (!VisualVoicemailSettingsUtil.isEnabled(getContext(), phoneAccountHandle)) {
       if (helper.isLegacyModeEnabled()) {
         VvmLog.i(TAG, "Setting up filter for legacy mode");
         helper.activateSmsFilter();
       }
       VvmLog.i(TAG, "VVM is disabled");
       return;
     }

     // OmtpVvmCarrierConfigHelper can start the activation process; it will pass in a vvm
     // content provider URI which we will use.  On some occasions, setting that URI will
     // fail, so we will perform a few attempts to ensure that the vvm content provider has
     // a good chance of being started up.
     if (!VoicemailStatus.edit(getContext(), phoneAccountHandle)
         .setType(helper.getVvmType())
         .apply()) {
       VvmLog.e(TAG, "Failed to configure content provider - " + helper.getVvmType());
       fail();
     }
     VvmLog.i(TAG, "VVM content provider configured - " + helper.getVvmType());

     if (messageData == null
         && VvmAccountManager.isAccountActivated(getContext(), phoneAccountHandle)) {
       VvmLog.i(TAG, "Account is already activated");
       // The activated state might come from restored data, the filter still needs to be set up.
       helper.activateSmsFilter();
       onSuccess(getContext(), phoneAccountHandle, helper);
       return;
     }
     helper.handleEvent(
         VoicemailStatus.edit(getContext(), phoneAccountHandle), OmtpEvents.CONFIG_ACTIVATING);

     if (!hasSignal(getContext(), phoneAccountHandle)) {
       VvmLog.i(TAG, "Service lost during activation, aborting");
       // Restore the "NO SIGNAL" state since it will be overwritten by the CONFIG_ACTIVATING
       // event.
       helper.handleEvent(
           VoicemailStatus.edit(getContext(), phoneAccountHandle),
           OmtpEvents.NOTIFICATION_SERVICE_LOST);
       // Don't retry, a new activation will be started after the signal returned.
       return;
     }

     helper.activateSmsFilter();
     VoicemailStatus.Editor status = retryPolicy.getVoicemailStatusEditor();

     VisualVoicemailProtocol protocol = helper.getProtocol();

     Bundle data;
     boolean isCarrierInitiated = messageData != null;
     if (isCarrierInitiated) {
       // The content of STATUS SMS is provided to launch this task, no need to request it
       // again.
       data = messageData;
     } else {
       try (StatusSmsFetcher fetcher = new StatusSmsFetcher(getContext(), phoneAccountHandle)) {
         protocol.startActivation(helper, fetcher.getSentIntent());
         // Both the fetcher and OmtpMessageReceiver will be triggered, but
         // OmtpMessageReceiver will just route the SMS back to ActivationTask, which will be
         // rejected because the task is still running.
         data = fetcher.get();
       } catch (TimeoutException e) {
         // The carrier is expected to return an STATUS SMS within STATUS_SMS_TIMEOUT_MILLIS
         // handleEvent() will do the logging.
         helper.handleEvent(status, OmtpEvents.CONFIG_STATUS_SMS_TIME_OUT);
         fail();
         return;
       } catch (CancellationException e) {
         VvmLog.e(TAG, "Unable to send status request SMS");
         fail();
         return;
       } catch (InterruptedException | ExecutionException | IOException e) {
         VvmLog.e(TAG, "can't get future STATUS SMS", e);
         fail();
         return;
       }
     }

     StatusMessage message = new StatusMessage(data);
     VvmLog.d(
         TAG,
         "STATUS SMS received: st="
             + message.getProvisioningStatus()
             + ", rc="
             + message.getReturnCode());
     if (message.getProvisioningStatus().equals(OmtpConstants.SUBSCRIBER_READY)) {
       VvmLog.d(TAG, "subscriber ready, no activation required");
       updateSource(getContext(), phoneAccountHandle, message, helper);
     } else {
       if (helper.supportsProvisioning()) {
         VvmLog.i(TAG, "Subscriber not ready, start provisioning");
         helper.startProvisioning(
             this, phoneAccountHandle, status, message, data, isCarrierInitiated);

       } else if (message.getProvisioningStatus().equals(OmtpConstants.SUBSCRIBER_NEW)) {
         VvmLog.i(TAG, "Subscriber new but provisioning is not supported");
         // Ignore the non-ready state and attempt to use the provided info as is.
         // This is probably caused by not completing the new user tutorial.
         updateSource(getContext(), phoneAccountHandle, message, helper);
       } else {
         VvmLog.i(TAG, "Subscriber not ready but provisioning is not supported");
         helper.handleEvent(status, OmtpEvents.CONFIG_SERVICE_NOT_AVAILABLE);
       }
     }
     LoggerUtils.logImpressionOnMainThread(
         getContext(), DialerImpression.Type.VVM_ACTIVATION_COMPLETED);
   }

   private static void updateSource(
       Context context,
       PhoneAccountHandle phone,
       StatusMessage message,
       OmtpVvmCarrierConfigHelper config) {

     if (OmtpConstants.SUCCESS.equals(message.getReturnCode())) {
       // Save the IMAP credentials in preferences so they are persistent and can be retrieved.
       VvmAccountManager.addAccount(context, phone, message);
       onSuccess(context, phone, config);
     } else {
       VvmLog.e(TAG, "Visual voicemail not available for subscriber.");
     }
   }

   private static void onSuccess(
       Context context, PhoneAccountHandle phoneAccountHandle, OmtpVvmCarrierConfigHelper config) {
     config.handleEvent(
         VoicemailStatus.edit(context, phoneAccountHandle),
         OmtpEvents.CONFIG_REQUEST_STATUS_SUCCESS);
     clearLegacyVoicemailNotification(context, phoneAccountHandle);
     SyncTask.start(context, phoneAccountHandle);
   }

   /** Sends a broadcast to the dialer UI to clear legacy voicemail notifications if any. */
   private static void clearLegacyVoicemailNotification(
       Context context, PhoneAccountHandle phoneAccountHandle) {
     Intent intent = new Intent(VoicemailClient.ACTION_SHOW_LEGACY_VOICEMAIL);
     intent.setPackage(context.getPackageName());
     intent.putExtra(TelephonyManager.EXTRA_PHONE_ACCOUNT_HANDLE, phoneAccountHandle);
     // Setting voicemail message count to zero will clear the notification.
     intent.putExtra(TelephonyManager.EXTRA_NOTIFICATION_COUNT, 0);
     context.sendBroadcast(intent);
   }

   private static boolean hasSignal(Context context, PhoneAccountHandle phoneAccountHandle) {
     TelephonyManager telephonyManager =
         context
             .getSystemService(TelephonyManager.class)
             .createForPhoneAccountHandle(phoneAccountHandle);
     return telephonyManager.getServiceState().getState() == ServiceState.STATE_IN_SERVICE;
   }

   @VisibleForTesting
   void setConfigForTest(OmtpVvmCarrierConfigHelper config) {
     configForTest = config;
   }
 }
	/*
	* Copyright (C) 2016 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License
	*/

	package com.android.voicemail.impl;

	import android.annotation.TargetApi;
	import android.content.Context;
	import android.content.Intent;
	import android.os.Build.VERSION_CODES;
	import android.os.Bundle;
	import android.provider.Settings;
	import android.support.annotation.Nullable;
	import android.support.annotation.VisibleForTesting;
	import android.support.annotation.WorkerThread;
	import android.telecom.PhoneAccountHandle;
	import android.telephony.ServiceState;
	import android.telephony.TelephonyManager;
	import com.android.dialer.logging.DialerImpression;
	import com.android.dialer.proguard.UsedByReflection;
	import com.android.voicemail.VoicemailClient;
	import com.android.voicemail.impl.protocol.VisualVoicemailProtocol;
	import com.android.voicemail.impl.scheduling.BaseTask;
	import com.android.voicemail.impl.scheduling.RetryPolicy;
	import com.android.voicemail.impl.settings.VisualVoicemailSettingsUtil;
	import com.android.voicemail.impl.sms.StatusMessage;
	import com.android.voicemail.impl.sms.StatusSmsFetcher;
	import com.android.voicemail.impl.sync.SyncTask;
	import com.android.voicemail.impl.sync.VvmAccountManager;
	import com.android.voicemail.impl.utils.LoggerUtils;
	import java.io.IOException;
	import java.util.concurrent.CancellationException;
	import java.util.concurrent.ExecutionException;
	import java.util.concurrent.TimeoutException;

	/**
	* Task to activate the visual voicemail service. A request to activate VVM will be sent to the
	* carrier, which will respond with a STATUS SMS. The credentials will be updated from the SMS. If
	* the user is not provisioned provisioning will be attempted. Activation happens when the phone
	* boots, the SIM is inserted, signal returned when VVM is not activated yet, and when the carrier
	* spontaneously sent a STATUS SMS.
	*/
	@TargetApi(VERSION_CODES.O)
	@UsedByReflection(value = "Tasks.java")
	public class ActivationTask extends BaseTask {

	private static final String TAG = "VvmActivationTask";

	private static final int RETRY_TIMES = 4;
	private static final int RETRY_INTERVAL_MILLIS = 5_000;

	@VisibleForTesting static final String EXTRA_MESSAGE_DATA_BUNDLE = "extra_message_data_bundle";

	private final RetryPolicy retryPolicy;

	@Nullable private OmtpVvmCarrierConfigHelper configForTest;

	private Bundle messageData;

	public ActivationTask() {
	super(TASK_ACTIVATION);
	retryPolicy = new RetryPolicy(RETRY_TIMES, RETRY_INTERVAL_MILLIS);
	addPolicy(retryPolicy);
	}

	/** Has the user gone through the setup wizard yet. */
	private static boolean isDeviceProvisioned(Context context) {
	return Settings.Global.getInt(
	context.getContentResolver(), Settings.Global.DEVICE_PROVISIONED, 0)
	== 1;
	}

	/**
	* @param messageData The optional bundle from {@link android.provider.VoicemailContract#
	* EXTRA_VOICEMAIL_SMS_FIELDS}, if the task is initiated by a status SMS. If null the task
	* will request a status SMS itself.
	*/
	public static void start(
	Context context, PhoneAccountHandle phoneAccountHandle, @Nullable Bundle messageData) {
	if (!isDeviceProvisioned(context)) {
	VvmLog.i(TAG, "Activation requested while device is not provisioned, postponing");
	// Activation might need information such as system language to be set, so wait until
	// the setup wizard is finished. The data bundle from the SMS will be re-requested upon
	// activation.
	DeviceProvisionedJobService.activateAfterProvisioned(context, phoneAccountHandle);
	return;
	}

	Intent intent = BaseTask.createIntent(context, ActivationTask.class, phoneAccountHandle);
	if (messageData != null) {
	intent.putExtra(EXTRA_MESSAGE_DATA_BUNDLE, messageData);
	}
	context.sendBroadcast(intent);
	}

	@Override
	public void onCreate(Context context, Bundle extras) {
	super.onCreate(context, extras);
	messageData = extras.getParcelable(EXTRA_MESSAGE_DATA_BUNDLE);
	}

	@Override
	public Intent createRestartIntent() {
	LoggerUtils.logImpressionOnMainThread(
	getContext(), DialerImpression.Type.VVM_AUTO_RETRY_ACTIVATION);
	Intent intent = super.createRestartIntent();
	// mMessageData is discarded, request a fresh STATUS SMS for retries.
	return intent;
	}

	@Override
	@WorkerThread
	public void onExecuteInBackgroundThread() {
	Assert.isNotMainThread();
	LoggerUtils.logImpressionOnMainThread(
	getContext(), DialerImpression.Type.VVM_ACTIVATION_STARTED);
	PhoneAccountHandle phoneAccountHandle = getPhoneAccountHandle();
	if (phoneAccountHandle == null) {
	// This should never happen
	VvmLog.e(TAG, "null PhoneAccountHandle");
	return;
	}

	PreOMigrationHandler.migrate(getContext(), phoneAccountHandle);

	OmtpVvmCarrierConfigHelper helper;
	if (configForTest != null) {
	helper = configForTest;
	} else {
	helper = new OmtpVvmCarrierConfigHelper(getContext(), phoneAccountHandle);
	}
	if (!helper.isValid()) {
	VvmLog.i(TAG, "VVM not supported on phoneAccountHandle " + phoneAccountHandle);
	VvmAccountManager.removeAccount(getContext(), phoneAccountHandle);
	return;
	}

	if (!VisualVoicemailSettingsUtil.isEnabled(getContext(), phoneAccountHandle)) {
	if (helper.isLegacyModeEnabled()) {
	VvmLog.i(TAG, "Setting up filter for legacy mode");
	helper.activateSmsFilter();
	}
	VvmLog.i(TAG, "VVM is disabled");
	return;
	}

	// OmtpVvmCarrierConfigHelper can start the activation process; it will pass in a vvm
	// content provider URI which we will use. On some occasions, setting that URI will
	// fail, so we will perform a few attempts to ensure that the vvm content provider has
	// a good chance of being started up.
	if (!VoicemailStatus.edit(getContext(), phoneAccountHandle)
	.setType(helper.getVvmType())
	.apply()) {
	VvmLog.e(TAG, "Failed to configure content provider - " + helper.getVvmType());
	fail();
	}
	VvmLog.i(TAG, "VVM content provider configured - " + helper.getVvmType());

	if (messageData == null
	&& VvmAccountManager.isAccountActivated(getContext(), phoneAccountHandle)) {
	VvmLog.i(TAG, "Account is already activated");
	// The activated state might come from restored data, the filter still needs to be set up.
	helper.activateSmsFilter();
	onSuccess(getContext(), phoneAccountHandle, helper);
	return;
	}
	helper.handleEvent(
	VoicemailStatus.edit(getContext(), phoneAccountHandle), OmtpEvents.CONFIG_ACTIVATING);

	if (!hasSignal(getContext(), phoneAccountHandle)) {
	VvmLog.i(TAG, "Service lost during activation, aborting");
	// Restore the "NO SIGNAL" state since it will be overwritten by the CONFIG_ACTIVATING
	// event.
	helper.handleEvent(
	VoicemailStatus.edit(getContext(), phoneAccountHandle),
	OmtpEvents.NOTIFICATION_SERVICE_LOST);
	// Don't retry, a new activation will be started after the signal returned.
	return;
	}

	helper.activateSmsFilter();
	VoicemailStatus.Editor status = retryPolicy.getVoicemailStatusEditor();

	VisualVoicemailProtocol protocol = helper.getProtocol();

	Bundle data;
	boolean isCarrierInitiated = messageData != null;
	if (isCarrierInitiated) {
	// The content of STATUS SMS is provided to launch this task, no need to request it
	// again.
	data = messageData;
	} else {
	try (StatusSmsFetcher fetcher = new StatusSmsFetcher(getContext(), phoneAccountHandle)) {
	protocol.startActivation(helper, fetcher.getSentIntent());
	// Both the fetcher and OmtpMessageReceiver will be triggered, but
	// OmtpMessageReceiver will just route the SMS back to ActivationTask, which will be
	// rejected because the task is still running.
	data = fetcher.get();
	} catch (TimeoutException e) {
	// The carrier is expected to return an STATUS SMS within STATUS_SMS_TIMEOUT_MILLIS
	// handleEvent() will do the logging.
	helper.handleEvent(status, OmtpEvents.CONFIG_STATUS_SMS_TIME_OUT);
	fail();
	return;
	} catch (CancellationException e) {
	VvmLog.e(TAG, "Unable to send status request SMS");
	fail();
	return;
	} catch (InterruptedException \| ExecutionException \| IOException e) {
	VvmLog.e(TAG, "can't get future STATUS SMS", e);
	fail();
	return;
	}
	}

	StatusMessage message = new StatusMessage(data);
	VvmLog.d(
	TAG,
	"STATUS SMS received: st="
	+ message.getProvisioningStatus()
	+ ", rc="
	+ message.getReturnCode());
	if (message.getProvisioningStatus().equals(OmtpConstants.SUBSCRIBER_READY)) {
	VvmLog.d(TAG, "subscriber ready, no activation required");
	updateSource(getContext(), phoneAccountHandle, message, helper);
	} else {
	if (helper.supportsProvisioning()) {
	VvmLog.i(TAG, "Subscriber not ready, start provisioning");
	helper.startProvisioning(
	this, phoneAccountHandle, status, message, data, isCarrierInitiated);

	} else if (message.getProvisioningStatus().equals(OmtpConstants.SUBSCRIBER_NEW)) {
	VvmLog.i(TAG, "Subscriber new but provisioning is not supported");
	// Ignore the non-ready state and attempt to use the provided info as is.
	// This is probably caused by not completing the new user tutorial.
	updateSource(getContext(), phoneAccountHandle, message, helper);
	} else {
	VvmLog.i(TAG, "Subscriber not ready but provisioning is not supported");
	helper.handleEvent(status, OmtpEvents.CONFIG_SERVICE_NOT_AVAILABLE);
	}
	}
	LoggerUtils.logImpressionOnMainThread(
	getContext(), DialerImpression.Type.VVM_ACTIVATION_COMPLETED);
	}

	private static void updateSource(
	Context context,
	PhoneAccountHandle phone,
	StatusMessage message,
	OmtpVvmCarrierConfigHelper config) {

	if (OmtpConstants.SUCCESS.equals(message.getReturnCode())) {
	// Save the IMAP credentials in preferences so they are persistent and can be retrieved.
	VvmAccountManager.addAccount(context, phone, message);
	onSuccess(context, phone, config);
	} else {
	VvmLog.e(TAG, "Visual voicemail not available for subscriber.");
	}
	}

	private static void onSuccess(
	Context context, PhoneAccountHandle phoneAccountHandle, OmtpVvmCarrierConfigHelper config) {
	config.handleEvent(
	VoicemailStatus.edit(context, phoneAccountHandle),
	OmtpEvents.CONFIG_REQUEST_STATUS_SUCCESS);
	clearLegacyVoicemailNotification(context, phoneAccountHandle);
	SyncTask.start(context, phoneAccountHandle);
	}

	/** Sends a broadcast to the dialer UI to clear legacy voicemail notifications if any. */
	private static void clearLegacyVoicemailNotification(
	Context context, PhoneAccountHandle phoneAccountHandle) {
	Intent intent = new Intent(VoicemailClient.ACTION_SHOW_LEGACY_VOICEMAIL);
	intent.setPackage(context.getPackageName());
	intent.putExtra(TelephonyManager.EXTRA_PHONE_ACCOUNT_HANDLE, phoneAccountHandle);
	// Setting voicemail message count to zero will clear the notification.
	intent.putExtra(TelephonyManager.EXTRA_NOTIFICATION_COUNT, 0);
	context.sendBroadcast(intent);
	}

	private static boolean hasSignal(Context context, PhoneAccountHandle phoneAccountHandle) {
	TelephonyManager telephonyManager =
	context
	.getSystemService(TelephonyManager.class)
	.createForPhoneAccountHandle(phoneAccountHandle);
	return telephonyManager.getServiceState().getState() == ServiceState.STATE_IN_SERVICE;
	}

	@VisibleForTesting
	void setConfigForTest(OmtpVvmCarrierConfigHelper config) {
	configForTest = config;
	}
	}