Fixes lint errors for a menu item.

e.g.

AppCompatResource: Menu namespace
Should use app:showAsAction with the appcompat library with xmlns:app="http://schemas.android.com/apk/res-auto"
 16
 17 <menu xmlns:android="http://schemas.android.com/apk/res/android">
 18     <item android:id="@+id/menu_toggle_log"
 19           android:showAsAction="always"
 20           android:title="@string/sample_show_log" />
 21 </menu>

Change-Id: Ia3dc8ba6a58f882600e3332e4ca770fe51de0a6b