docs: New N Preview "permissions changes" doc

page.title=Permission changes

page.metaDescription=Updates to permissions in the N Developer Preview.

page.keywords="android N", "permissions"

@jd:body

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    <h2>In this document</h2>

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        <li><a href="#GET_ACCOUNTS">GET_ACCOUNTS deprecated</a></li>

        <li><a href="#storage">New storage option:

        ACTION_OPEN_EXTERNAL_DIRECTORY</a></li>

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<p>

 The N Developer Preview includes the following changes to permissions.

</p>

<h2 id="GET_ACCOUNTS">GET_ACCOUNTS deprecated</h2>

<p>

  The <code>GET_ACCOUNTS</code> permission is now deprecated. The system ignores

  this permission for apps that target the N Developer Preview.

</p>

<h2 id="storage">New storage option: ACTION_OPEN_EXTERNAL_DIRECTORY</h2>

<p>

  Apps can now use the intent <code>ACTION_OPEN_EXTERNAL_DIRECTORY</code> to

  request that the system create a directory for the app's use. The system

  prompts the user to grant approval. If the user approves, the app can read

  and write files and directories in that one directory (and its descendants).

  The app does not need {@link android.Manifest.permission_group#STORAGE

  STORAGE} permissions to access this external directory.

</p>

<p>

  For more information about this intent, see the <code>Intent</code>

  documentation in the <!--TODO: Add link to preview download page-->N Preview

  SDK Reference.

</p>