[BEEEP] Support for automatic TOTP token copy via external autofill (Android) (#2220)

* Android: Support for automatic TOTP copy via external autofill

* update iOS autofill interface

* additional tweaks

src/Android/Autofill/AutofillExternalSelectionActivity.cs

@@ -0,0 +1,42 @@
+using System.Threading.Tasks;
+using Android.App;
+using Android.Content.PM;
+using Android.OS;
+using Bit.Core.Abstractions;
+using Bit.Core.Utilities;
+using Bit.Droid.Utilities;
+
+namespace Bit.Droid.Autofill
+{
+    [Activity(
+        NoHistory = true,
+        LaunchMode = LaunchMode.SingleTop)]
+    public class AutofillExternalSelectionActivity : Xamarin.Forms.Platform.Android.FormsAppCompatActivity
+    {
+        protected override void OnCreate(Bundle bundle)
+        {
+            Intent?.Validate();
+            base.OnCreate(bundle);
+
+            var cipherId = Intent?.GetStringExtra(AutofillConstants.AutofillFrameworkCipherId);
+            if (string.IsNullOrEmpty(cipherId))
+            {
+                SetResult(Result.Canceled);
+                Finish();
+                return;
+            }
+
+            GetCipherAndPerformAutofillAsync(cipherId).FireAndForget();
+        }
+
+        private async Task GetCipherAndPerformAutofillAsync(string cipherId)
+        {
+            var cipherService = ServiceContainer.Resolve<ICipherService>();
+            var cipher = await cipherService.GetAsync(cipherId);
+            var decCipher = await cipher.DecryptAsync();
+
+            var autofillHandler = ServiceContainer.Resolve<IAutofillHandler>();
+            autofillHandler.Autofill(decCipher);
+        }
+    }
+}