update wear header template to support sticky nav.
moved the search and menu markup for the header into a method call.
also update the styles and script so that when a page does not belong
to a primary horizontal-nav link, the header logo is used for the breadcrumb's
first link and text.

Change-Id: I14129fe7657924e2037c103674e09322c4c31db8
diff --git a/tools/droiddoc/templates-sdk-dyn/assets/js/docs.js b/tools/droiddoc/templates-sdk-dyn/assets/js/docs.js
index 09d5f7a..e6befe3 100644
--- a/tools/droiddoc/templates-sdk-dyn/assets/js/docs.js
+++ b/tools/droiddoc/templates-sdk-dyn/assets/js/docs.js
@@ -564,6 +564,12 @@
   }
   // Add the primary horizontal nav
   var $selectedFirstNav = $("div#header-wrap ul.nav-x a.selected").clone().removeClass("selected");
+  // If there's no header nav item, use the logo link and title from alt text
+  if ($selectedFirstNav.length < 1) {
+    $selectedFirstNav = $("<a>")
+        .attr('href', $("div#header .logo a").attr('href'))
+        .text($("div#header .logo img").attr('alt'));
+  }
   $breadcrumbUl.prepend($("<li>").append($selectedFirstNav));
 }