Fix MultiStoreExceptionEntry build config

This CL fixes one typo in the BUILD file for this class and enables
type-checking.

Bug: None
Change-Id: Ie6e6fa959acd0800c1efbde634065ab06de832f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2233023
Auto-Submit: Victor Vianna <victorvianna@google.com>
Reviewed-by: Marc Treib <treib@chromium.org>
Commit-Queue: Victor Vianna <victorvianna@google.com>
Cr-Commit-Position: refs/heads/master@{#776114}

chrome/browser/resources/settings/autofill_page/BUILD.gn

@@ -17,6 +17,7 @@ js_type_check("closure_compile_module") {
     ":credit_card_edit_dialog",
     ":credit_card_list_entry",
     ":merge_passwords_store_copies_behavior",
+    ":multi_store_exception_entry",
     ":multi_store_id_handler",
     ":multi_store_password_ui_entry",
     ":password_check",
@@ -167,7 +168,7 @@ js_library("multi_store_password_ui_entry") {
 }
 
 js_library("multi_store_exception_entry") {
-  sources = [ "multi_store_password_ui_entry.js" ]
+  sources = [ "multi_store_exception_entry.js" ]
   deps = [
     ":multi_store_id_handler",
     ":password_manager_proxy",