Help fallbacks and intent work

- Handle a backup URI, so that if the specified URI is not available,
   another can be used.
 - Add some data to help intents when they are intent URIs
 - Fill in the context with a classname when it isn't present

Bug: 15475009
Change-Id: I7050fa61121901929e650b20bd7a0ae21e8ba207

src/com/android/settings/fuelgauge/PowerUsageSummary.java

@@ -135,7 +135,7 @@ public class PowerUsageSummary extends PowerUsageBase {
         String helpUrl;
         if (!TextUtils.isEmpty(helpUrl = getResources().getString(R.string.help_url_battery))) {
             final MenuItem help = menu.add(0, MENU_HELP, 0, R.string.help_label);
-            HelpUtils.prepareHelpMenuItem(getActivity(), help, helpUrl);
+            HelpUtils.prepareHelpMenuItem(getActivity(), help, helpUrl, getClass().getName());
         }
     }