Make copies of NetworkInfo to give out.

Otherwise we'll change it out from under those we've given it too.
bug:5233462

Change-Id: Iffc886849edfa6ced3da1133f9d363e11b2733f8

Author: Robert Greenwalt

core/java/android/net/MobileDataStateTracker.java

@@ -386,7 +386,7 @@ private void setDetailedState(NetworkInfo.DetailedState state, String reason,
                     && lastReason != null)
                 reason = lastReason;
             mNetworkInfo.setDetailedState(state, reason, extraInfo);
-            Message msg = mTarget.obtainMessage(EVENT_STATE_CHANGED, mNetworkInfo);
+            Message msg = mTarget.obtainMessage(EVENT_STATE_CHANGED, new NetworkInfo(mNetworkInfo));
             msg.sendToTarget();
         }
     }

core/java/android/net/NetworkInfo.java

@@ -138,6 +138,23 @@ public NetworkInfo(int type, int subtype, String typeName, String subtypeName) {
         mIsRoaming = false;
     }
 
+    /** {@hide} */
+    public NetworkInfo(NetworkInfo source) {
+        if (source != null) {
+            mNetworkType = source.mNetworkType;
+            mSubtype = source.mSubtype;
+            mTypeName = source.mTypeName;
+            mSubtypeName = source.mSubtypeName;
+            mState = source.mState;
+            mDetailedState = source.mDetailedState;
+            mReason = source.mReason;
+            mExtraInfo = source.mExtraInfo;
+            mIsFailover = source.mIsFailover;
+            mIsRoaming = source.mIsRoaming;
+            mIsAvailable = source.mIsAvailable;
+        }
+    }
+
     /**
      * Reports the type of network (currently mobile or Wi-Fi) to which the
      * info in this object pertains.

wifi/java/android/net/wifi/WifiStateTracker.java

@@ -160,7 +160,7 @@ public void privateDnsRouteSet(boolean enabled) {
      * Fetch NetworkInfo for the network
      */
     public NetworkInfo getNetworkInfo() {
-        return mNetworkInfo;
+        return new NetworkInfo(mNetworkInfo);
     }
 
     /**
@@ -226,7 +226,8 @@ public void onReceive(Context context, Intent intent) {
                 } else {
                     mLastState = state;
                 }
-                Message msg = mCsHandler.obtainMessage(EVENT_STATE_CHANGED, mNetworkInfo);
+                Message msg = mCsHandler.obtainMessage(EVENT_STATE_CHANGED,
+                        new NetworkInfo(mNetworkInfo));
                 msg.sendToTarget();
             } else if (intent.getAction().equals(WifiManager.LINK_CONFIGURATION_CHANGED_ACTION)) {
                 mLinkProperties = (LinkProperties) intent.getParcelableExtra(