diff --git a/core/java/android/net/NetworkPolicy.java b/core/java/android/net/NetworkPolicy.java
index 596f431..714227d 100644
--- a/core/java/android/net/NetworkPolicy.java
+++ b/core/java/android/net/NetworkPolicy.java
@@ -338,7 +338,9 @@
         out.writeInt(TEMPLATE_BACKUP_VERSION_LATEST);
 
         out.writeInt(template.getMatchRule());
-        BackupUtils.writeString(out, template.getSubscriberIds().iterator().next());
+        final Set<String> subscriberIds = template.getSubscriberIds();
+        BackupUtils.writeString(out, subscriberIds.isEmpty()
+                ? null : subscriberIds.iterator().next());
         BackupUtils.writeString(out, template.getWifiNetworkKeys().isEmpty()
                 ? null : template.getWifiNetworkKeys().iterator().next());
         out.writeInt(template.getMeteredness());
diff --git a/core/tests/coretests/src/android/net/NetworkPolicyTest.kt b/core/tests/coretests/src/android/net/NetworkPolicyTest.kt
index 3c8f90c..6360a2d 100644
--- a/core/tests/coretests/src/android/net/NetworkPolicyTest.kt
+++ b/core/tests/coretests/src/android/net/NetworkPolicyTest.kt
@@ -16,7 +16,9 @@
 
 package android.net
 
+import android.net.NetworkStats.METERED_YES
 import android.net.NetworkTemplate.MATCH_BLUETOOTH
+import android.net.NetworkTemplate.MATCH_CARRIER
 import android.net.NetworkTemplate.MATCH_ETHERNET
 import android.net.NetworkTemplate.MATCH_MOBILE
 import android.net.NetworkTemplate.MATCH_WIFI
@@ -39,11 +41,19 @@
     @Test
     fun testTemplateBackupRestore() {
         assertPolicyBackupRestore(createTestPolicyForTemplate(
-                NetworkTemplate.buildTemplateWifi(TEST_WIFI_NETWORK_KEY1)))
+                NetworkTemplate.Builder(MATCH_WIFI)
+                    .setWifiNetworkKeys(setOf(TEST_WIFI_NETWORK_KEY1))
+                    .build()))
         assertPolicyBackupRestore(createTestPolicyForTemplate(
-                NetworkTemplate.buildTemplateMobileAll(TEST_IMSI1)))
+                NetworkTemplate.Builder(MATCH_MOBILE)
+                    .setSubscriberIds(setOf(TEST_IMSI1))
+                    .setMeteredness(METERED_YES)
+                    .build()))
         assertPolicyBackupRestore(createTestPolicyForTemplate(
-                NetworkTemplate.buildTemplateCarrierMetered(TEST_IMSI1)))
+                NetworkTemplate.Builder(MATCH_CARRIER)
+                    .setSubscriberIds(setOf(TEST_IMSI1))
+                    .setMeteredness(METERED_YES)
+                    .build()))
     }
 
     private fun createTestPolicyForTemplate(template: NetworkTemplate): NetworkPolicy {
diff --git a/core/tests/coretests/src/com/android/internal/os/MobileRadioPowerCalculatorTest.java b/core/tests/coretests/src/com/android/internal/os/MobileRadioPowerCalculatorTest.java
index c20293b..95225b2 100644
--- a/core/tests/coretests/src/com/android/internal/os/MobileRadioPowerCalculatorTest.java
+++ b/core/tests/coretests/src/com/android/internal/os/MobileRadioPowerCalculatorTest.java
@@ -16,6 +16,9 @@
 
 package com.android.internal.os;
 
+import static android.net.NetworkStats.DEFAULT_NETWORK_NO;
+import static android.net.NetworkStats.METERED_NO;
+import static android.net.NetworkStats.ROAMING_NO;
 import static android.os.BatteryStats.POWER_DATA_UNAVAILABLE;
 
 import static com.google.common.truth.Truth.assertThat;
@@ -94,7 +97,8 @@
 
         // Note application network activity
         NetworkStats networkStats = new NetworkStats(10000, 1)
-                .insertEntry("cellular", APP_UID, 0, 0, 1000, 100, 2000, 20, 100);
+                .addEntry(new NetworkStats.Entry("cellular", APP_UID, 0, 0,
+                        METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO, 1000, 100, 2000, 20, 100));
         mStatsRule.setNetworkStats(networkStats);
 
         ModemActivityInfo mai = new ModemActivityInfo(10000, 2000, 3000,
@@ -160,7 +164,8 @@
 
         // Note application network activity
         mStatsRule.setNetworkStats(new NetworkStats(10000, 1)
-                .insertEntry("cellular", APP_UID, 0, 0, 1000, 100, 2000, 20, 100));
+                .addEntry(new NetworkStats.Entry("cellular", APP_UID, 0, 0,
+                    METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO, 1000, 100, 2000, 20, 100)));
 
         stats.noteModemControllerActivity(null, POWER_DATA_UNAVAILABLE, 10000, 10000,
                 mNetworkStatsManager);
@@ -169,7 +174,8 @@
                 BatteryStats.Uid.PROCESS_STATE_BACKGROUND, 11000);
 
         mStatsRule.setNetworkStats(new NetworkStats(12000, 1)
-                .insertEntry("cellular", APP_UID, 0, 0, 1000, 250, 2000, 80, 200));
+                .addEntry(new NetworkStats.Entry("cellular", APP_UID, 0, 0,
+                    METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO, 1000, 250, 2000, 80, 200)));
 
         stats.noteModemControllerActivity(null, POWER_DATA_UNAVAILABLE, 12000, 12000,
                 mNetworkStatsManager);
@@ -241,7 +247,8 @@
 
         // Note application network activity
         NetworkStats networkStats = new NetworkStats(10000, 1)
-                .insertEntry("cellular", APP_UID, 0, 0, 1000, 100, 2000, 20, 100);
+                .addEntry(new NetworkStats.Entry("cellular", APP_UID, 0, 0,
+                        METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO, 1000, 100, 2000, 20, 100));
         mStatsRule.setNetworkStats(networkStats);
 
         ModemActivityInfo mai = new ModemActivityInfo(10000, 2000, 3000,
@@ -306,7 +313,8 @@
 
         // Note application network activity
         mStatsRule.setNetworkStats(new NetworkStats(10000, 1)
-                .insertEntry("cellular", APP_UID, 0, 0, 1000, 100, 2000, 20, 100));
+                .addEntry(new NetworkStats.Entry("cellular", APP_UID, 0, 0,
+                    METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO, 1000, 100, 2000, 20, 100)));
 
         stats.noteModemControllerActivity(null, 10_000_000, 10000, 10000, mNetworkStatsManager);
 
@@ -314,7 +322,8 @@
                 BatteryStats.Uid.PROCESS_STATE_BACKGROUND, 11000);
 
         mStatsRule.setNetworkStats(new NetworkStats(12000, 1)
-                .insertEntry("cellular", APP_UID, 0, 0, 1000, 250, 2000, 80, 200));
+                .addEntry(new NetworkStats.Entry("cellular", APP_UID, 0, 0,
+                    METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO, 1000, 250, 2000, 80, 200)));
 
         stats.noteModemControllerActivity(null, 15_000_000, 12000, 12000, mNetworkStatsManager);
 
diff --git a/core/tests/coretests/src/com/android/internal/os/WifiPowerCalculatorTest.java b/core/tests/coretests/src/com/android/internal/os/WifiPowerCalculatorTest.java
index a368399..f74e72b 100644
--- a/core/tests/coretests/src/com/android/internal/os/WifiPowerCalculatorTest.java
+++ b/core/tests/coretests/src/com/android/internal/os/WifiPowerCalculatorTest.java
@@ -17,6 +17,9 @@
 package com.android.internal.os;
 
 
+import static android.net.NetworkStats.DEFAULT_NETWORK_NO;
+import static android.net.NetworkStats.METERED_NO;
+import static android.net.NetworkStats.ROAMING_NO;
 import static android.os.BatteryStats.POWER_DATA_UNAVAILABLE;
 
 import static com.google.common.truth.Truth.assertThat;
@@ -77,8 +80,12 @@
     private NetworkStats buildNetworkStats(long elapsedRealtime, int rxBytes, int rxPackets,
             int txBytes, int txPackets) {
         return new NetworkStats(elapsedRealtime, 1)
-                .insertEntry("wifi", APP_UID, 0, 0, rxBytes, rxPackets, txBytes, txPackets, 100)
-                .insertEntry("wifi", Process.WIFI_UID, 0, 0, 1111, 111, 2222, 22, 111);
+                .addEntry(new NetworkStats.Entry("wifi", APP_UID, 0, 0,
+                        METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO, rxBytes, rxPackets,
+                        txBytes, txPackets, 100))
+                .addEntry(new NetworkStats.Entry("wifi", Process.WIFI_UID, 0, 0,
+                        METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO, 1111, 111,
+                        2222, 22, 111));
     }
 
     /** Sets up an WifiActivityEnergyInfo for ActivityController-model-based tests. */