Re-remove CONNECTIVITY_CHANGE_DELAY and supporting functions.

Since optimistic addresses are useable upon kernel notification
there is no need for this extra connectivity delay.

---

This functionality was originally submitted in ag/572619.  Owing
to issues with bind()ing to optimistic addresses (see b/18609055)
this was reverted in ag/598673.

This reverts the revert.  :-)

Bug: 17769720
Change-Id: Ibee490b2af72050693b6bd748193f51e312ca527
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 0062eb2..555f64c 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -6128,7 +6128,7 @@
 
         /**
          * The number of milliseconds to delay before sending out
-         * {@link ConnectivityManager#CONNECTIVITY_ACTION} broadcasts.
+         * {@link ConnectivityManager#CONNECTIVITY_ACTION} broadcasts. Ignored.
          *
          * @hide
          */