stubbed out login service using accessibility apis for android.

src/Android/Android.csproj

@@ -204,6 +204,7 @@
     </Reference>
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="LoginService.cs" />
     <Compile Include="Controls\ExtendedEditorRenderer.cs" />
     <Compile Include="Controls\ExtendedNavigationPage.cs" />
     <Compile Include="Controls\ExtendedSwitchCellRenderer.cs" />
@@ -280,6 +281,9 @@
   <ItemGroup>
     <AndroidResource Include="Resources\drawable-xxhdpi\ion_plus.png" />
   </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\xml\accessibilityservice.xml" />
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
   <Import Project="..\..\packages\Xamarin.Android.Support.Vector.Drawable.23.3.0\build\Xamarin.Android.Support.Vector.Drawable.targets" Condition="Exists('..\..\packages\Xamarin.Android.Support.Vector.Drawable.23.3.0\build\Xamarin.Android.Support.Vector.Drawable.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">

src/Android/LoginService.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Android.AccessibilityServices;
+using Android.App;
+using Android.Content;
+using Android.OS;
+using Android.Runtime;
+using Android.Views;
+using Android.Views.Accessibility;
+using Android.Widget;
+
+namespace Bit.Android
+{
+    [Service(Permission = "android.permission.BIND_ACCESSIBILITY_SERVICE", Label = "bitwarden")]
+    [IntentFilter(new string[] { "android.accessibilityservice.AccessibilityService" })]
+    [MetaData("android.accessibilityservice", Resource = "@xml/accessibilityservice")]
+    public class LoginService : AccessibilityService
+    {
+        public override void OnAccessibilityEvent(AccessibilityEvent e)
+        {
+            var eventType = e.EventType;
+            switch(eventType)
+            {
+                case EventTypes.ViewTextSelectionChanged:
+                    if(e.Source.Password)
+                    {
+                        var bundle = new Bundle();
+                        bundle.PutCharSequence(AccessibilityNodeInfo.ActionArgumentSetTextCharsequence, "mypassword");
+                        e.Source.PerformAction(global::Android.Views.Accessibility.Action.SetText, bundle);
+                    }
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        public override void OnInterrupt()
+        {
+
+        }
+    }
+}

src/Android/Resources/xml/accessibilityservice.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
+    android:accessibilityEventTypes="typeViewTextSelectionChanged"
+    android:accessibilityFeedbackType="feedbackAllMask"
+    android:notificationTimeout="100"
+    android:canRetrieveWindowContent="true"
+    android:canRequestEnhancedWebAccessibility="true"/>