Enable Gratuitous Neighbor Discovery feature by default.

Bug: 138926174
Test: atest NetworkStackIntegrationTests
Change-Id: I1c75e50a08312cc9be48834bbe853e832abb7a59
diff --git a/src/android/net/ip/IpClient.java b/src/android/net/ip/IpClient.java
index 9747c2c..f214cb5 100644
--- a/src/android/net/ip/IpClient.java
+++ b/src/android/net/ip/IpClient.java
@@ -1089,7 +1089,7 @@
     }
 
     private boolean isGratuitousNaEnabled() {
-        return mDependencies.isFeatureEnabled(mContext, IPCLIENT_GRATUITOUS_NA_VERSION);
+        return mDependencies.isFeatureNotChickenedOut(mContext, IPCLIENT_GRATUITOUS_NA_VERSION);
     }
 
     private boolean isGratuitousArpNaRoamingEnabled() {