Move `connector_pref` and `common` files to the `core` folder.

This refactor to make the `components/enterprise/connectors` directory
compliant with the layered components approach.

Bug: b/344593927
Change-Id: I453763f35b34c23f450fb2939f0e8ce3e85d3db1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5741778
Commit-Queue: Nancy Xiao <[email protected]>
Auto-Submit: Nancy Xiao <[email protected]>
Reviewed-by: Dominique Fauteux-Chapleau <[email protected]>
Reviewed-by: Nico Weber <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1336715}
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 7a77947..f878713 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -124,7 +124,7 @@
 #include "components/embedder_support/origin_trials/origin_trial_prefs.h"
 #include "components/enterprise/browser/identifiers/identifiers_prefs.h"
 #include "components/enterprise/buildflags/buildflags.h"
-#include "components/enterprise/connectors/connectors_prefs.h"
+#include "components/enterprise/connectors/core/connectors_prefs.h"
 #include "components/fingerprinting_protection_filter/common/fingerprinting_protection_filter_constants.h"
 #include "components/flags_ui/pref_service_flags_storage.h"
 #include "components/history_clusters/core/history_clusters_prefs.h"