docs: Updating Android for Work N Preview page for DP2.

<p>

  Device owners and profile owners can temporarily suspend access to packages

  by calling the new <code>DevicePolicyManager.getPackagesSuspended()</code>

  by calling the new <code>DevicePolicyManager.setPackagesSuspended()</code>

  method. Owners can use the same method to re-enable those packages.

</p>

<p>

  While a package is suspended, it cannot start activities, and notifications

  to the package are suppressed. Suspended packages do not show in the <a href=

  While a package is suspended, it cannot start activities, notifications to

  the package are suppressed, and the app's entry in the <a

  href="{@docRoot}guide/components/recents.html">overview screen</a> is hidden.

  Suspended packages do not show in the <a href=

  "{@docRoot}guide/components/recents.html">overview screen</a>, and they

  cannot show dialogs (including toasts and snackbars). They also cannot play

  audio or vibrate the device.

<p>

  Launchers should apply a distinctive UI to suspended apps to show that the

  apps aren't currently available; for example, they might render the app icon

  in gray. Launchers can find out which apps are suspended by calling the new

  <code>DevicePolicyManager.getPackagesSuspended()</code> method.

  in gray. Launchers can find out if an app is suspended by calling the new

  <code>DevicePolicyManager.getPackageSuspended()</code> method.

</p>

<h2 id="toggle-work">Toggle Work Mode</h2>

<p>On dual-profile devices, users can toggle work mode on and off. While work

  mode is turned off, the managed profile is temporarily shut down. Work profile apps, background sync, and notifications are all disabled, including the profile

  owner app. While the work profile is disabled, the system  displays a persistent status icon to remind users that they can't launch work apps. The system launcher

  indicates that work apps and widgets are not accessible.

<p>

  On dual-profile devices, users can toggle work mode on and off. While work

  mode is turned off, the managed profile is temporarily shut down. Work

  profile apps, background sync, and notifications are all disabled, including

  the profile owner app. While the work profile is disabled, the system

  displays a persistent status icon to remind users that they can't launch work

  apps. The system launcher indicates that work apps and widgets are not

  accessible.

</p>

<h2 id="always-on-vpn">Always-On VPN</h2>

<p>

  Device owners can identify suspicious activity by remotely tracking device

  activity, including app launches, adb activity, and screen unlocks. Process

  logs don’t require user consent. To retrieve logs, device owners enable

  device logging using <code>setDeviceLoggingEnabled()</code>.

  device logging using <code>DevicePolicyManager.setSecurityLoggingEnabled()</code>.

</p>

<p>

  The new <code>android.auditing.SecurityLog</code> class includes these

  methods:

  API changes include:

</p>

<ul>

  <li>

    The new class <code>android.app.admin.SecurityLog</code> and its

    methods

  </li>

  <li>

    <code>void DevicePolicyManager.setDeviceLoggingEnabled()</code>

    <code>void DevicePolicyManager.setSecurityLoggingEnabled()</code>

  </li>

  <li>

    <code>boolean DevicePolicyManager.getDeviceLoggingEnabled()</code>

    <code>boolean DevicePolicyManager.isSecurityLoggingEnabled()</code>

  </li>

  <li>

    <code>List DevicePolicyManager.retrieveDeviceLogs()</code>

    <code>List&lt;SecurityEvent&gt;

      DevicePolicyManager.retrieveSecurityLogs()</code>

  </li>

  <li>

    <code>List DevicePolicyManager.retrievePreviousDeviceLogs()</code>

    <code>List&lt;SecurityEvent&gt;

      DevicePolicyManager.retrievePreRebootSecurityLogs()</code>

  </li>

  <li>

<p>

  Device owners can provide owner information to be shownon the lockscreen.

  This information takes precedence the user lock screen message (if one is

  This information takes precedence over the user lock screen message (if one is

  set). New {@link android.app.admin.DevicePolicyManager} methods are:

</p>