Implement ComboView for Bookmarks, History and SavedPages

 - Replaces ComboViewActivity for PhoneUi.
 - Lives as part of the BrowserActivity's ViewTree.
 - Avoids construction of ComboViewActivity everytime the bookmarks screen is opened.

Change-Id: Ic7042de731a4cc2107a297c9f7d4356bc2c30f2e
diff --git a/res/values-sw600dp-v17/styles.xml b/res/values-sw600dp-v17/styles.xml
index bcfb749..84b17b5 100644
--- a/res/values-sw600dp-v17/styles.xml
+++ b/res/values-sw600dp-v17/styles.xml
@@ -21,7 +21,7 @@
         <item name="android:windowActionBar">true</item>
         <item name="android:windowNoTitle">false</item>
         <!--<item name="android:windowActionModeOverlay">true</item>-->
-        <item name="android:actionBarStyle">@style/ActionBarStyle</item>
+        <item name="android:actionBarStyle">@style/LightActionBarStyle</item>
         <item name="android:actionBarSize">56dip</item>
     </style>