refactor: DCM - const border radius, constructor & switch expressions (#19515)

* enable border radius, switch exp, const constructor

* regenerate provider

* more formatting

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/providers/image/cache/image_loader.dart

@@ -42,6 +42,6 @@ class ImageLoader {
     }
 
     // If we get here, the image failed to load from the cache stream
-    throw ImageLoadingException('Could not load image from stream');
+    throw const ImageLoadingException('Could not load image from stream');
   }
 }

mobile/lib/providers/image/exceptions/image_loading_exception.dart

@@ -1,5 +1,5 @@
 /// An exception for the [ImageLoader] and the Immich image providers
 class ImageLoadingException implements Exception {
   final String message;
-  ImageLoadingException(this.message);
+  const ImageLoadingException(this.message);
 }

mobile/lib/providers/image/immich_remote_image_provider.dart

@@ -23,7 +23,7 @@ class ImmichRemoteImageProvider
   /// The image cache manager
   final CacheManager? cacheManager;
 
-  ImmichRemoteImageProvider({
+  const ImmichRemoteImageProvider({
     required this.assetId,
     this.cacheManager,
   });

mobile/lib/providers/image/immich_remote_thumbnail_provider.dart

@@ -24,7 +24,7 @@ class ImmichRemoteThumbnailProvider
   /// The image cache manager
   final CacheManager? cacheManager;
 
-  ImmichRemoteThumbnailProvider({
+  const ImmichRemoteThumbnailProvider({
     required this.assetId,
     this.height,
     this.width,