Call SyncSwitchAccessPrefsToSignInProfile after a user accepts Switch Access dialog to close

AccessibilityControllerImpl::UpdateFeatureFromPref->
    case FeatureType::kSwitchAccess:
    with !enabled

never calls
SyncSwitchAccessPrefsToSignInProfile();

Call it when the resulting dialog is closed with user accepting yes to close.

R=anastasi@google.com, dmazzoni@chromium.org

Fixed: 1122768
Change-Id: I3822dc5d98c201effb0cde2e5ad5005e8a20cc05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2382011Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802738}

ash/accessibility/accessibility_controller_impl.cc

@@ -1843,6 +1843,7 @@ void AccessibilityControllerImpl::SwitchAccessDisableDialogClosed(
   DeactivateSwitchAccess();
   if (disable_dialog_accepted) {
     NotifyAccessibilityStatusChanged();
+    SyncSwitchAccessPrefsToSignInProfile();
   } else {
     // Reset the preference (which was already set to false). Doing so turns
     // switch access back on.