Remove unused imports in frameworks/base.

Change-Id: I031443de83f93eb57a98863001826671b18f3b17
diff --git a/services/core/java/com/android/server/NsdService.java b/services/core/java/com/android/server/NsdService.java
index 39aa972..f4c6225 100644
--- a/services/core/java/com/android/server/NsdService.java
+++ b/services/core/java/com/android/server/NsdService.java
@@ -38,7 +38,6 @@
 import java.io.UnsupportedEncodingException;
 import java.net.InetAddress;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.CountDownLatch;
diff --git a/services/core/java/com/android/server/net/IpConfigStore.java b/services/core/java/com/android/server/net/IpConfigStore.java
index b5a450d..90e26d8 100644
--- a/services/core/java/com/android/server/net/IpConfigStore.java
+++ b/services/core/java/com/android/server/net/IpConfigStore.java
@@ -24,25 +24,19 @@
 import android.net.ProxyInfo;
 import android.net.RouteInfo;
 import android.net.StaticIpConfiguration;
-import android.os.Handler;
-import android.os.HandlerThread;
-import android.text.TextUtils;
 import android.util.Log;
 import android.util.SparseArray;
 
 import com.android.server.net.DelayedDiskWrite;
 
 import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
 import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.EOFException;
 import java.io.FileInputStream;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.net.InetAddress;
 import java.net.Inet4Address;
-import java.util.Map;
 
 public class IpConfigStore {
     private static final String TAG = "IpConfigStore";
diff --git a/services/core/java/com/android/server/net/NetworkStatsCollection.java b/services/core/java/com/android/server/net/NetworkStatsCollection.java
index 3ac20f7..20f5f97 100644
--- a/services/core/java/com/android/server/net/NetworkStatsCollection.java
+++ b/services/core/java/com/android/server/net/NetworkStatsCollection.java
@@ -22,10 +22,8 @@
 import static android.net.NetworkStats.TAG_NONE;
 import static android.net.NetworkStats.UID_ALL;
 import static android.net.TrafficStats.UID_REMOVED;
-import static android.text.format.DateUtils.SECOND_IN_MILLIS;
 import static android.text.format.DateUtils.WEEK_IN_MILLIS;
 
-import android.net.ConnectivityManager;
 import android.net.NetworkIdentity;
 import android.net.NetworkStats;
 import android.net.NetworkStatsHistory;