stub out support for dark theme by default

src/Android/Services/DeviceActionService.cs

@@ -612,6 +612,11 @@ namespace Bit.Droid.Services
             }
         }
 
+        public bool UsingDarkTheme()
+        {
+            return false;
+        }
+
         private bool DeleteDir(Java.IO.File dir)
         {
             if(dir != null && dir.IsDirectory)

src/App/Abstractions/IDeviceActionService.cs

@@ -35,5 +35,6 @@ namespace Bit.App.Abstractions
         string GetBuildNumber();
         void OpenAccessibilitySettings();
         void OpenAutofillSettings();
+        bool UsingDarkTheme();
     }
 }

src/App/Utilities/ThemeManager.cs

@@ -1,6 +1,8 @@
-using Bit.App.Services;
+using Bit.App.Abstractions;
+using Bit.App.Services;
 using Bit.App.Styles;
 using Bit.Core;
+using Bit.Core.Utilities;
 using Xamarin.Forms;
 
 namespace Bit.App.Utilities
@@ -29,9 +31,21 @@ namespace Bit.App.Utilities
             {
                 Application.Current.Resources.MergedDictionaries.Add(new Nord());
             }
+            else if(name == "light")
+            {
+                Application.Current.Resources.MergedDictionaries.Add(new Nord());
+            }
             else
             {
-                Application.Current.Resources.MergedDictionaries.Add(new Light());
+                var deviceActionService = ServiceContainer.Resolve<IDeviceActionService>("deviceActionService", true);
+                if(deviceActionService?.UsingDarkTheme() ?? false)
+                {
+                    Application.Current.Resources.MergedDictionaries.Add(new Dark());
+                }
+                else
+                {
+                    Application.Current.Resources.MergedDictionaries.Add(new Light());
+                }
             }
 
             // Base styles

src/iOS.Core/Services/DeviceActionService.cs

@@ -351,6 +351,11 @@ namespace Bit.iOS.Core.Services
             throw new NotImplementedException();
         }
 
+        public bool UsingDarkTheme()
+        {
+            return false;
+        }
+
         private void ImagePicker_FinishedPickingMedia(object sender, UIImagePickerMediaPickedEventArgs e)
         {
             if(sender is UIImagePickerController picker)