Added an activity that shows lists of CA certificates in two tabs

src/frontends/android/res/layout/trusted_certificates_activity.xml

@@ -0,0 +1,20 @@
+<?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.
+-->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" >
+
+</FrameLayout>

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

@@ -58,7 +58,10 @@
     <string name="alert_text_nocertfound">Bitte wählen Sie eines aus oder aktivieren Sie <i>Automatisch wählen</i></string>
 
     <!-- Trusted certificate selection -->
+    <string name="trusted_certs_title">CA-Zertifikate</string>
     <string name="no_certificates">Keine Zertifikate</string>
+    <string name="system_tab">System</string>
+    <string name="user_tab">Benutzer</string>
 
     <!-- VPN state fragment -->
     <string name="state_label">Status:</string>

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

@@ -58,7 +58,10 @@
     <string name="alert_text_nocertfound">Please select one or activate <i>Select automatically</i></string>
 
     <!-- Trusted certificate selection -->
+    <string name="trusted_certs_title">CA certificates</string>
     <string name="no_certificates">No certificates</string>
+    <string name="system_tab">System</string>
+    <string name="user_tab">User</string>
 
     <!-- VPN state fragment -->
     <string name="state_label">Status:</string>