[Nearby] Don't start background scanning if Nearby disallowed

@hen Nearby is disallowed by policy the service is still created but
the nearby_sharing.enabled pref is forced to "off"

All changes verified manually.

Change-Id: I29f82fb4084bee79b63706ae397d582f411cddad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3149970
Commit-Queue: Claude van der Merwe <[email protected]>
Reviewed-by: Michael Hansen <[email protected]>
Reviewed-by: Josh Nohle <[email protected]>
Cr-Commit-Position: refs/heads/main@{#921490}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 3908efc..39a2c29 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -4625,6 +4625,8 @@
       "nearby_sharing/nearby_receive_manager.h",
       "nearby_sharing/nearby_share_delegate_impl.cc",
       "nearby_sharing/nearby_share_delegate_impl.h",
+      "nearby_sharing/nearby_share_feature_status.cc",
+      "nearby_sharing/nearby_share_feature_status.h",
       "nearby_sharing/nearby_share_feature_usage_metrics.cc",
       "nearby_sharing/nearby_share_feature_usage_metrics.h",
       "nearby_sharing/nearby_share_metrics_logger.cc",