Docs: Adding new file for power mgmt (doze, app standby, exemptions). Update to toc.

      Updating batterystats for wifi, bluetooth, cell data.
      Adhering to 80 char column, minor tweaks
      Adding feedback, fixing one grammar error.
      Adding Matt's awesome feedback on batterystats
      Remove order numbers, clean up table format, add new entries
      Add power profile for multi-cpu, escape characters
      Add feedback from Clay
      Adding feedback from unsuk and meghan
      Adding power values feedback
      Adding power_profile.xml link
      Removing sample power values in favor of link to .xml

Bug: 20951506
Bug: 20950365
Bug: 20950190
Bug: 20950047
Bug: 23481311
Bug: 22409074

Change-Id: I8cf8cbce455173e71ce9eb4de1d6be91575e1974
diff --git a/src/devices/devices_toc.cs b/src/devices/devices_toc.cs
index 82a4750..a6ac62b 100644
--- a/src/devices/devices_toc.cs
+++ b/src/devices/devices_toc.cs
@@ -260,6 +260,8 @@
           <a href="<?cs var:toroot ?>devices/tech/power/index.html"><span class="en">Power</span></a>
         </div>
         <ul>
+          <li><a href="<?cs var:toroot ?>devices/tech/power/mgmt.html">Power Management</a>
+          </li>
           <li><a href="<?cs var:toroot ?>devices/tech/power/component.html">Component Power</a></li>
           <li><a href="<?cs var:toroot ?>devices/tech/power/device.html">Device Power</a>
           </li>