added http proxy authentication (see #819)

mobile/res/layout/http_authentication.xml

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2008 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+  
+          http://www.apache.org/licenses/LICENSE-2.0
+  
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    >
+
+    <TextView 
+        android:layout_height="wrap_content"
+        android:layout_width="wrap_content"
+        android:text="@string/username"
+        android:layout_marginTop="12dip"
+        android:layout_marginLeft="20dip"
+        android:layout_marginRight="20dip" />
+            
+    <EditText
+        android:id="@+id/username_edit"
+        android:layout_height="wrap_content"
+        android:layout_width="match_parent"
+        android:scrollHorizontally="true"
+        android:inputType="text"
+        android:layout_marginLeft="20dip"
+        android:layout_marginRight="20dip"
+        android:layout_marginBottom="12dip"
+        android:singleLine="true"
+        android:imeOptions="actionNext" />
+
+    <TextView
+        android:layout_height="wrap_content"
+        android:layout_width="wrap_content"
+        android:text="@string/password"
+        android:layout_marginLeft="20dip"
+        android:layout_marginRight="20dip" />
+            
+    <EditText
+        android:id="@+id/password_edit"
+        android:layout_height="wrap_content"
+        android:layout_width="match_parent"
+        android:scrollHorizontally="true"
+        android:inputType="textPassword"
+        android:layout_marginLeft="20dip"
+        android:layout_marginRight="20dip"
+        android:layout_marginBottom="12dip"
+        android:singleLine="true"
+        android:imeOptions="actionDone" />
+</LinearLayout>
+