[iOS] Avoid crashing when reloading items in GoogleServices

`self.passwordLeakCheckItem` is only added in the table view when
`kEnhancedProtection` feature is disabled.
This patch makes sure `kEnhancedProtection` is disabled before to
update `passwordLeakCheckItem`, and to ask its consumer to reload it.

Fixed: 1353810
Change-Id: I705635d2e7778b1099624a2131e915cd53668ce7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3838778
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Auto-Submit: Jérôme Lebel <jlebel@chromium.org>
Reviewed-by: Joemer Ramos <joemerramos@chromium.org>
Commit-Queue: Joemer Ramos <joemerramos@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1036661}