Enable voice search in omnibox

  Bug: 6601348

Bring back voice search. Also fixes focus bug for fixed titlebar.

Change-Id: I83c8ad96957b62c23ad0bbb35685712687d11213
diff --git a/res/layout/title_bar_nav.xml b/res/layout/title_bar_nav.xml
index 31e47bc..15568c3 100644
--- a/res/layout/title_bar_nav.xml
+++ b/res/layout/title_bar_nav.xml
@@ -89,6 +89,15 @@
             style="@style/Suggestions"
             android:background="@null" />
         <ImageView
+            android:id="@+id/voice"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:paddingRight="4dip"
+            android:contentDescription="@string/accessibility_button_voice"
+            android:src="@drawable/ic_voice_search_holo_dark"
+            style="@style/HoloButton"
+            android:visibility="gone" />
+        <ImageView
             android:id="@+id/clear"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"