Provide a menu with options to save VPN profiles

The ID of the updated/inserted profile is sent back to the activity that
started the detail view.

src/frontends/android/res/menu/profile_edit.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright (C) 2012 Tobias Brunner
+    Hochschule fuer Technik Rapperswil
+
+    This program is free software; you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the
+    Free Software Foundation; either version 2 of the License, or (at your
+    option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+
+    This program is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+-->
+<menu xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <item
+        android:id="@+id/menu_accept"
+        android:title="@string/profile_edit_save"
+        android:showAsAction="always|withText" />
+
+    <item
+        android:id="@+id/menu_cancel"
+        android:title="@string/profile_edit_cancel"
+        android:showAsAction="ifRoom" />
+
+</menu>

src/frontends/android/res/values/strings.xml

@@ -25,11 +25,16 @@
     <string name="add_profile">Add VPN profile</string>
 
     <!-- VPN profile details -->
+    <string name="profile_edit_save">Save</string>
+    <string name="profile_edit_cancel">Cancel</string>
     <string name="profile_name_label">Profile Name:</string>
     <string name="profile_name_hint">(use gateway address)</string>
     <string name="profile_gateway_label">Gateway:</string>
     <string name="profile_username_label">Username:</string>
     <string name="profile_password_label">Password:</string>
     <string name="profile_password_hint">(prompt when needed)</string>
+    <!-- Warnings/Notifications in the details view -->
+    <string name="alert_text_no_input_gateway">Please enter the gateway address here</string>
+    <string name="alert_text_no_input_username">Please enter your username here</string>
 
 </resources>