Add entry to set the default initial screen to Home when in Jetpack app settings

Author: zwarm

WordPress/src/jetpack/res/values/strings.xml

@@ -26,4 +26,7 @@
 
     <!-- About button in Me -->
     <string name="me_btn_about">About Jetpack</string>
+
+    <!-- My Site Initial Tab Default value -->
+    <string name="initial_screen_entry_value_default_key" translatable="false">@string/initial_screen_entry_value_home</string>
 </resources>