Settings + adding mutexes whenever possible.

android/res/menu/global.xml

@@ -1,7 +1,7 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto" >
 
-    <item android:id="@+id/search"
+    <item android:id="@+id/action_search"
           android:title="@string/search_title"
           android:icon="@drawable/abc_ic_search_api_mtrl_alpha"
           app:showAsAction="always"