diff --git a/service-t/src/com/android/server/net/NetworkIdentitySet.java b/framework-t/src/android/net/NetworkIdentitySet.java
similarity index 96%
rename from service-t/src/com/android/server/net/NetworkIdentitySet.java
rename to framework-t/src/android/net/NetworkIdentitySet.java
index 22ed781..abbebef 100644
--- a/service-t/src/com/android/server/net/NetworkIdentitySet.java
+++ b/framework-t/src/android/net/NetworkIdentitySet.java
@@ -14,9 +14,10 @@
  * limitations under the License.
  */
 
-package com.android.server.net;
+package android.net;
 
-import android.net.NetworkIdentity;
+import static android.net.ConnectivityManager.TYPE_MOBILE;
+
 import android.service.NetworkIdentitySetProto;
 import android.util.proto.ProtoOutputStream;
 
@@ -25,8 +26,6 @@
 import java.io.IOException;
 import java.util.HashSet;
 
-import static android.net.ConnectivityManager.TYPE_MOBILE;
-
 /**
  * Identity of a {@code iface}, defined by the set of {@link NetworkIdentity}
  * active on that interface.
@@ -97,6 +96,9 @@
         }
     }
 
+    /**
+     * Method to serialize this object into a {@code DataOutput}.
+     */
     public void writeToStream(DataOutput out) throws IOException {
         out.writeInt(VERSION_ADD_OEM_MANAGED_NETWORK);
         out.writeInt(size());
@@ -179,6 +181,9 @@
         return ident.compareTo(anotherIdent);
     }
 
+    /**
+     * Method to dump this object into proto debug file.
+     */
     public void dumpDebug(ProtoOutputStream proto, long tag) {
         final long start = proto.start(tag);
 
diff --git a/service-t/src/com/android/server/net/NetworkStatsAccess.java b/framework-t/src/android/net/NetworkStatsAccess.java
similarity index 97%
rename from service-t/src/com/android/server/net/NetworkStatsAccess.java
rename to framework-t/src/android/net/NetworkStatsAccess.java
index d25eae4..3885a9e 100644
--- a/service-t/src/com/android/server/net/NetworkStatsAccess.java
+++ b/framework-t/src/android/net/NetworkStatsAccess.java
@@ -11,10 +11,10 @@
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
- * limitations under the License
+ * limitations under the License.
  */
 
-package com.android.server.net;
+package android.net;
 
 import static android.Manifest.permission.READ_NETWORK_USAGE_HISTORY;
 import static android.net.NetworkStats.UID_ALL;
@@ -37,7 +37,11 @@
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
-/** Utility methods for controlling access to network stats APIs. */
+/**
+ * Utility methods for controlling access to network stats APIs.
+ *
+ * @hide
+ */
 public final class NetworkStatsAccess {
     private NetworkStatsAccess() {}
 
diff --git a/service-t/src/com/android/server/net/NetworkStatsCollection.java b/framework-t/src/android/net/NetworkStatsCollection.java
similarity index 97%
rename from service-t/src/com/android/server/net/NetworkStatsCollection.java
rename to framework-t/src/android/net/NetworkStatsCollection.java
index 213ea40..0d3b9ed 100644
--- a/service-t/src/com/android/server/net/NetworkStatsCollection.java
+++ b/framework-t/src/android/net/NetworkStatsCollection.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.server.net;
+package android.net;
 
 import static android.net.NetworkStats.DEFAULT_NETWORK_NO;
 import static android.net.NetworkStats.DEFAULT_NETWORK_YES;
@@ -31,13 +31,7 @@
 import static android.text.format.DateUtils.WEEK_IN_MILLIS;
 
 import static com.android.internal.net.NetworkUtilsInternal.multiplySafeByRational;
-import static com.android.server.net.NetworkStatsService.TAG;
 
-import android.net.NetworkIdentity;
-import android.net.NetworkStats;
-import android.net.NetworkStatsHistory;
-import android.net.NetworkTemplate;
-import android.net.TrafficStats;
 import android.os.Binder;
 import android.service.NetworkStatsCollectionKeyProto;
 import android.service.NetworkStatsCollectionProto;
@@ -85,8 +79,11 @@
 /**
  * Collection of {@link NetworkStatsHistory}, stored based on combined key of
  * {@link NetworkIdentitySet}, UID, set, and tag. Knows how to persist itself.
+ *
+ * @hide
  */
 public class NetworkStatsCollection implements FileRotator.Reader, FileRotator.Writer {
+    private static final String TAG = NetworkStatsCollection.class.getSimpleName();
     /** File header magic number: "ANET" */
     private static final int FILE_MAGIC = 0x414E4554;
 
@@ -366,8 +363,8 @@
                 entry.uid = key.uid;
                 entry.set = key.set;
                 entry.tag = key.tag;
-                entry.defaultNetwork = key.ident.areAllMembersOnDefaultNetwork() ?
-                        DEFAULT_NETWORK_YES : DEFAULT_NETWORK_NO;
+                entry.defaultNetwork = key.ident.areAllMembersOnDefaultNetwork()
+                        ? DEFAULT_NETWORK_YES : DEFAULT_NETWORK_NO;
                 entry.metered = key.ident.isAnyMemberMetered() ? METERED_YES : METERED_NO;
                 entry.roaming = key.ident.isAnyMemberRoaming() ? ROAMING_YES : ROAMING_NO;
                 entry.rxBytes = historyEntry.rxBytes;
@@ -521,6 +518,12 @@
         }
     }
 
+    /**
+     * Read legacy network summary statistics file format into the collection,
+     * See {@code NetworkStatsService#maybeUpgradeLegacyStatsLocked}.
+     *
+     * @deprecated
+     */
     @Deprecated
     public void readLegacyNetwork(File file) throws IOException {
         final AtomicFile inputFile = new AtomicFile(file);
@@ -560,6 +563,12 @@
         }
     }
 
+    /**
+     * Read legacy Uid statistics file format into the collection,
+     * See {@code NetworkStatsService#maybeUpgradeLegacyStatsLocked}.
+     *
+     * @deprecated
+     */
     @Deprecated
     public void readLegacyUid(File file, boolean onlyTags) throws IOException {
         final AtomicFile inputFile = new AtomicFile(file);
@@ -774,19 +783,19 @@
         public final int set;
         public final int tag;
 
-        private final int hashCode;
+        private final int mHashCode;
 
-        public Key(NetworkIdentitySet ident, int uid, int set, int tag) {
+        Key(NetworkIdentitySet ident, int uid, int set, int tag) {
             this.ident = ident;
             this.uid = uid;
             this.set = set;
             this.tag = tag;
-            hashCode = Objects.hash(ident, uid, set, tag);
+            mHashCode = Objects.hash(ident, uid, set, tag);
         }
 
         @Override
         public int hashCode() {
-            return hashCode;
+            return mHashCode;
         }
 
         @Override
diff --git a/service-t/src/com/android/server/net/NetworkStatsObservers.java b/service-t/src/com/android/server/net/NetworkStatsObservers.java
index 2564dae..1a0866d 100644
--- a/service-t/src/com/android/server/net/NetworkStatsObservers.java
+++ b/service-t/src/com/android/server/net/NetworkStatsObservers.java
@@ -22,7 +22,10 @@
 
 import android.app.usage.NetworkStatsManager;
 import android.net.DataUsageRequest;
+import android.net.NetworkIdentitySet;
 import android.net.NetworkStats;
+import android.net.NetworkStatsAccess;
+import android.net.NetworkStatsCollection;
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
 import android.os.Bundle;
diff --git a/service-t/src/com/android/server/net/NetworkStatsRecorder.java b/service-t/src/com/android/server/net/NetworkStatsRecorder.java
index 978ae87..5e27c77 100644
--- a/service-t/src/com/android/server/net/NetworkStatsRecorder.java
+++ b/service-t/src/com/android/server/net/NetworkStatsRecorder.java
@@ -21,8 +21,11 @@
 import static android.net.TrafficStats.MB_IN_BYTES;
 import static android.text.format.DateUtils.YEAR_IN_MILLIS;
 
+import android.net.NetworkIdentitySet;
 import android.net.NetworkStats;
 import android.net.NetworkStats.NonMonotonicObserver;
+import android.net.NetworkStatsAccess;
+import android.net.NetworkStatsCollection;
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
 import android.net.TrafficStats;
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
index c876d41..2beca73 100644
--- a/service-t/src/com/android/server/net/NetworkStatsService.java
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -96,11 +96,14 @@
 import android.net.Network;
 import android.net.NetworkCapabilities;
 import android.net.NetworkIdentity;
+import android.net.NetworkIdentitySet;
 import android.net.NetworkSpecifier;
 import android.net.NetworkStack;
 import android.net.NetworkStateSnapshot;
 import android.net.NetworkStats;
 import android.net.NetworkStats.NonMonotonicObserver;
+import android.net.NetworkStatsAccess;
+import android.net.NetworkStatsCollection;
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
 import android.net.TelephonyNetworkSpecifier;