Simplify states

mobile/lib/services/machine_learning/semantic_search/frameworks/ml_framework.dart

@@ -16,9 +16,9 @@ abstract class MLFramework {
   static final _logger = Logger("MLFramework");
 
   final bool shouldDownloadOverMobileData;
+  final _initializationCompleter = Completer<void>();
 
   InitializationState _state = InitializationState.notInitialized;
-  final _initializationCompleter = Completer<void>();
 
   MLFramework(this.shouldDownloadOverMobileData) {
     Connectivity()
@@ -64,6 +64,7 @@ abstract class MLFramework {
   /// instead of a CDN.
   Future<void> init() async {
     try {
+      _initState = InitializationState.initializing;
       await Future.wait([_initImageModel(), _initTextModel()]);
     } catch (e, s) {
       _logger.warning(e, s);
@@ -101,17 +102,13 @@ abstract class MLFramework {
     if (!kImageEncoderEnabled) {
       return;
     }
-    _initState = InitializationState.initializingImageModel;
     final imageModel = await _getModel(getImageModelRemotePath());
     await loadImageModel(imageModel.path);
-    _initState = InitializationState.initializedImageModel;
   }
 
   Future<void> _initTextModel() async {
-    _initState = InitializationState.initializingTextModel;
     final textModel = await _getModel(getTextModelRemotePath());
     await loadTextModel(textModel.path);
-    _initState = InitializationState.initializedTextModel;
   }
 
   Future<File> _getModel(
@@ -153,9 +150,6 @@ class MLFrameworkInitializationUpdateEvent extends Event {
 enum InitializationState {
   notInitialized,
   waitingForNetwork,
-  initializingImageModel,
-  initializedImageModel,
-  initializingTextModel,
-  initializedTextModel,
+  initializing,
   initialized,
 }