Docs: Links added to pages for permissions and configuration activity

    <p>

      To start receiving complication data, a watch face calls

      <code>setActiveComplications</code> within the

      <code>WatchFaceService.Engine</code> class with a list of watch face

      <code>setActiveComplications</code>, in the

      <code>WatchFaceService.Engine</code> class, with a list of watch face

      complication IDs. A watch face creates these IDs to uniquely identify

      slots on the watch face where complications can appear, and passes them

      to the <code>createProviderChooserIntent</code> method (of the

    </p>

    <p>

      The configuration activity may also be used as an opportunity to request

      If a data provider needs a specific permission to access a user's data,

      then standard code

      for runtime <a href="{@docRoot}training/articles/wear-permissions.html">

      permissions</a> is needed.

      A <a href="{@docRoot}training/wearables/watch-faces/configuration.html">

      configuration activity</a> may be used as an opportunity to request

      any permissions required by the provider.

    </p>