Fixes #71: fix default values for IP to point to Demo instance

Author: atsakiridis

Examples/restcomm-helloworld/app/src/main/java/com/telestax/restcomm_helloworld/MainActivity.java

@@ -184,6 +184,8 @@ public void onConnected(RCConnection connection)
     public void onDisconnected(RCConnection connection)
     {
         Log.i(TAG, "RCConnection disconnected");
+        this.connection = null;
+        pendingConnection = null;
     }
 
     public void onDisconnected(RCConnection connection, int errorCode, String errorText) {

Examples/restcomm-messenger/app/src/main/java/com/telestax/restcomm_messenger/MainActivity.java

@@ -114,7 +114,7 @@ public void onError(Exception exception)
         prefs.registerOnSharedPreferenceChangeListener(this);
         initializeSipFromPreferences();
 
-        txtUri.setText("sip:[email protected]:5080");
+        txtUri.setText("sip:[email protected]:5080");
         txtMessage.setText("Hello there!");
 
         cbMuted.setEnabled(false);
@@ -400,7 +400,7 @@ public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
                                           String key) {
         boolean updated = false;
         if (key.equals("pref_proxy_ip")) {
-            params.put("pref_proxy_ip", prefs.getString("pref_proxy_ip", "192.168.2.32"));
+            params.put("pref_proxy_ip", prefs.getString("pref_proxy_ip", "54.225.212.193"));
             updated = true;
         } else if (key.equals("pref_proxy_port")) {
             params.put("pref_proxy_port", prefs.getString("pref_proxy_port", "5060"));
@@ -419,7 +419,7 @@ public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
 
     @SuppressWarnings("static-access")
     private void initializeSipFromPreferences() {
-        params.put("pref_proxy_ip", prefs.getString("pref_proxy_ip", "192.168.2.32"));
+        params.put("pref_proxy_ip", prefs.getString("pref_proxy_ip", "54.225.212.193"));
         params.put("pref_proxy_port", prefs.getString("pref_proxy_port", "5080"));
         params.put("pref_sip_user", prefs.getString("pref_sip_user", "bob"));
         params.put("pref_sip_password", prefs.getString("pref_sip_password", "1234"));

Examples/restcomm-messenger/app/src/main/res/xml/preferences.xml

@@ -13,7 +13,7 @@
         android:key="pref_sip_password"
         android:title="Password" />
     <EditTextPreference
-        android:defaultValue="192.168.2.32"
+        android:defaultValue="54.225.212.193"
         android:key="pref_proxy_ip"
         android:title="Proxy IP" />
     <EditTextPreference