Include roaming in NetworkIdentity.hashCode().

Change-Id: I148d95c8d08e3916a90fa78f7efee327d4b7de2a
diff --git a/core/java/android/net/NetworkIdentity.java b/core/java/android/net/NetworkIdentity.java
index aa6400b..1a74abf 100644
--- a/core/java/android/net/NetworkIdentity.java
+++ b/core/java/android/net/NetworkIdentity.java
@@ -45,7 +45,7 @@
 
     @Override
     public int hashCode() {
-        return Objects.hashCode(mType, mSubType, mSubscriberId);
+        return Objects.hashCode(mType, mSubType, mSubscriberId, mRoaming);
     }
 
     @Override