Doc change: Update AFW behavior changes for Preview 2.

  <li><strong>WiFi configuration removal:</strong> WiFi configurations added by a Profile Owner

(for example, through calls to the

{@link android.net.wifi.WifiManager#addNetwork(android.net.wifi.WifiConfiguration)

addNetwork()} method) are now removed if that work profile is deleted.</li>

addNetwork()} method) are now removed if that work profile is deleted.

  </li>

  <li><strong>WiFi configuration lockdown:</strong> Any WiFi configuration created by

  an active Device Owner can no longer be modified or deleted by the user if

  <code>Settings.Global.WIFI_DEVICE_OWNER_CONFIGS_LOCKDOWN</code> is non-zero.

  Owners have the privilege of editing/removing any WiFi configurations, including

  those not created by them.

  </li>

</li>

<li><strong>Download Work Policy Controller via Google account addition:</strong> When a Google

account that requires management via a Work Policy Controller (WPC) app is added to a device

outside of a managed context, the add account flow now prompts the user to install the

affect camera apps running on the primary user. </li>

  <li>In addition, the

{@link android.app.admin.DevicePolicyManager#setKeyguardDisabledFeatures(android.content.ComponentName,int) setKeyguardDisabledFeatures()}

    method is now available for Profile Owners, in addition to Device Owners. </li>

    method is now available for Profile Owners, as well as to Device Owners. </li>

  <li>A Profile Owner can set these keyguard restrictions:

    <ul>

    <li>{@link android.app.admin.DevicePolicyManager#KEYGUARD_DISABLE_TRUST_AGENTS} and

  <li>The {@link android.app.admin.DevicePolicyManager#setScreenCaptureDisabled(android.content.ComponentName, boolean) setScreenCaptureDisabled()} method now also blocks the assist structure when an app of the given user is in the foreground. </li>

  <li><code>EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_CHECKSUM</code> now defaults to SHA-256. SHA-1 is still supported for backwards compatibility but will be removed in future. <code>EXTRA_PROVISIONING_DEVICE_ADMIN_SIGNATURE_CHECKSUM</code> now only accepts SHA-256.</li>

  <li>Device initializer APIs which existed in the MNC preview are now removed. They will not appear in the final M release.</li>

    <li>Android for Work APIs are optimized for M runtime permissions, including Work profiles, assist layer, and others. New DevicePolicyManager permission APIs don't affect pre-M apps.</li>

    <li><code>EXTRA_PROVISIONING_RESET_PROTECTION_PARAMETERS</code> is removed so NFC bump provisioning cannot programmatically unlock a factory reset protected device.</li>

    <li>Android for Work APIs are optimized for M runtime permissions, including Work profiles, assist layer, and others. New <code>DevicePolicyManager</code> permission APIs don't affect pre-M apps.</li>

    </ul></li>

<li><strong>Changes to other APIs</strong>:

<ul>

    <li>Data Usage: The {@code android.app.usage.NetworkUsageStats} class has been renamed {@code android.app.usage.NetworkStats}.</li>

</ul>

    <li><strong>Changes to global settings</strong> &mdash; the settings below can no longer be set via {@link android.app.admin.DevicePolicyManager#setGlobalSetting(android.content.ComponentName, java.lang.String, java.lang.String) setGlobalSettings()}</code>:

    </li>

    <li><strong>Changes to global settings</strong>:

    <ul>

    <li>These settings can no longer be set via {@link android.app.admin.DevicePolicyManager#setGlobalSetting(android.content.ComponentName, java.lang.String, java.lang.String) setGlobalSettings()}</code>:

<ul>

    <li><code>BLUETOOTH_ON</code></li>

    <li><code>DEVELOPMENT_SETTINGS_ENABLED</code></li>

    <li><code>WIFI_ON</code></li> 

</ul>

    </li>

    <li>These global settings can now be set via <code><a href="/reference/android/app/admin/DevicePolicyManager.html#setGlobalSetting(android.content.ComponentName, java.lang.String, java.lang.String)">setGlobalSettings()</a></code>:

    <ul>

    <li><code>WIFI_DEVICE_OWNER_CONFIGS_LOCKDOWN</code></li>

    </ul>

    </li>

    </ul>

</ul>