Fix initial BubbleDialogModelHost checkbox state

Adds a missing checkbox->SetChecked() call to set the initial state on
the views side.

Bug: 1150027
Change-Id: I2fcf4d26ccd5358efbd7247c9533877da6643853
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2546188
Auto-Submit: Peter Boström <pbos@chromium.org>
Commit-Queue: Elad Alon <eladalon@chromium.org>
Reviewed-by: Elad Alon <eladalon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828646}

ui/views/bubble/bubble_dialog_model_host.cc

@@ -439,6 +439,7 @@ void BubbleDialogModelHost::AddOrUpdateCheckbox(
     const int line_height = label->GetLineHeight();
     checkbox = std::make_unique<CheckboxControl>(std::move(label), line_height);
   }
+  checkbox->SetChecked(model_field->is_checked());
 
   checkbox->SetCallback(base::BindRepeating(
       [](ui::DialogModelCheckbox* model_field,