Add missing reject_media check before avatar download via ActivityPub (#4862)

app/services/activitypub/process_account_service.rb

@@ -48,14 +48,14 @@ class ActivityPub::ProcessAccountService < BaseService
     @account.url                 = url || @uri
     @account.display_name        = @json['name'] || ''
     @account.note                = @json['summary'] || ''
-    @account.avatar_remote_url   = image_url('icon')
-    @account.header_remote_url   = image_url('image')
+    @account.avatar_remote_url   = image_url('icon')  unless skip_download?
+    @account.header_remote_url   = image_url('image') unless skip_download?
     @account.public_key          = public_key || ''
     @account.locked              = @json['manuallyApprovesFollowers'] || false
     @account.statuses_count      = outbox_total_items    if outbox_total_items.present?
     @account.following_count     = following_total_items if following_total_items.present?
     @account.followers_count     = followers_total_items if followers_total_items.present?
-    @account.save!
+    @account.save_with_optional_media!
   end
 
   def upgrade_account
@@ -115,6 +115,10 @@ class ActivityPub::ProcessAccountService < BaseService
     @collections[type] = nil
   end
 
+  def skip_download?
+    @account.suspended? || domain_block&.reject_media?
+  end
+
   def auto_suspend?
     domain_block && domain_block.suspend?
   end