feat(interface,android): Allow passing an initial locale to the service

packages/moxplatform_platform_interface/lib/src/isolate.dart

@@ -8,10 +8,12 @@ abstract class IsolateHandler {
   /// [entrypoint] is the entrypoint that is run inside the new isolate.
   /// [handleUIEvent] is a handler function that is called when the isolate receives data from the UI.
   /// [handleIsolateEvent] is a handler function that is called when the UI receives data from the service.
+  /// [initialLocale] the locale to pass to the background service when first starting.
   Future<void> start(
-    Future<void> Function() entrypoint,
+    Future<void> Function(String initialLocale) entrypoint,
     Future<void> Function(Map<String, dynamic>? data) handleUIEvent,
     Future<void> Function(Map<String, dynamic>? data) handleIsolateEvent,
+    String initialLocale,
   );
 
   /// Make sure that the UI event handler is registered without starting the isolate.

packages/moxplatform_platform_interface/lib/src/isolate_stub.dart

@@ -22,9 +22,10 @@ class StubIsolateHandler extends IsolateHandler {
 
   @override
   Future<void> start(
-    Future<void> Function() entrypoint,
+    Future<void> Function(String initialLocale) entrypoint,
     Future<void> Function(Map<String, dynamic>? data) handleUIEvent,
     Future<void> Function(Map<String, dynamic>? data) handleIsolateEvent,
+    String initialLocale,
   ) async {
     // ignore: avoid_print
     print('STUB STARTED!!!!!!');

packages/moxplatform_platform_interface/lib/src/platform_stub.dart

@@ -17,6 +17,9 @@ class StubPlatformImplementation extends PlatformImplementation {
 
   @override
   Future<bool> generateVideoThumbnail(
-          String src, String dest, int width) async =>
+    String src,
+    String dest,
+    int width,
+  ) async =>
       false;
 }

packages/moxplatform_platform_interface/lib/src/service.dart

@@ -11,7 +11,8 @@ abstract class BackgroundService {
   /// [handleEvent] is a function that is called whenever the service receives
   /// data.
   void init(
-    Future<void> Function() entrypoint,
+    Future<void> Function(String initialLocale) entrypoint,
     Future<void> Function(Map<String, dynamic>? data) handleEvent,
+    String initialLocale,
   );
 }