Revert Network Stats API stub for tracking of metered networks.

Bug: 25813958
Change-Id: I9d2835b7bacfffef05b1588f1301afc70f5f582f
diff --git a/api/current.txt b/api/current.txt
index 537ae8a..41b7160 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -6319,7 +6319,6 @@
   public static class NetworkStats.Bucket {
     ctor public NetworkStats.Bucket();
     method public long getEndTimeStamp();
-    method public int getMetering();
     method public int getRoaming();
     method public long getRxBytes();
     method public long getRxPackets();
@@ -6328,9 +6327,6 @@
     method public long getTxBytes();
     method public long getTxPackets();
     method public int getUid();
-    field public static final int METERING_ALL = -1; // 0xffffffff
-    field public static final int METERING_DEFAULT = 1; // 0x1
-    field public static final int METERING_METERED = 2; // 0x2
     field public static final int ROAMING_ALL = -1; // 0xffffffff
     field public static final int ROAMING_DEFAULT = 1; // 0x1
     field public static final int ROAMING_ROAMING = 2; // 0x2
diff --git a/api/system-current.txt b/api/system-current.txt
index 1091ff1..64d119c 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -6576,7 +6576,6 @@
   public static class NetworkStats.Bucket {
     ctor public NetworkStats.Bucket();
     method public long getEndTimeStamp();
-    method public int getMetering();
     method public int getRoaming();
     method public long getRxBytes();
     method public long getRxPackets();
@@ -6585,9 +6584,6 @@
     method public long getTxBytes();
     method public long getTxPackets();
     method public int getUid();
-    field public static final int METERING_ALL = -1; // 0xffffffff
-    field public static final int METERING_DEFAULT = 1; // 0x1
-    field public static final int METERING_METERED = 2; // 0x2
     field public static final int ROAMING_ALL = -1; // 0xffffffff
     field public static final int ROAMING_DEFAULT = 1; // 0x1
     field public static final int ROAMING_ROAMING = 2; // 0x2
diff --git a/api/test-current.txt b/api/test-current.txt
index 09a9cca..920b386 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -6321,7 +6321,6 @@
   public static class NetworkStats.Bucket {
     ctor public NetworkStats.Bucket();
     method public long getEndTimeStamp();
-    method public int getMetering();
     method public int getRoaming();
     method public long getRxBytes();
     method public long getRxPackets();
@@ -6330,9 +6329,6 @@
     method public long getTxBytes();
     method public long getTxPackets();
     method public int getUid();
-    field public static final int METERING_ALL = -1; // 0xffffffff
-    field public static final int METERING_DEFAULT = 1; // 0x1
-    field public static final int METERING_METERED = 2; // 0x2
     field public static final int ROAMING_ALL = -1; // 0xffffffff
     field public static final int ROAMING_DEFAULT = 1; // 0x1
     field public static final int ROAMING_ROAMING = 2; // 0x2
diff --git a/core/java/android/app/usage/NetworkStats.java b/core/java/android/app/usage/NetworkStats.java
index d263646..5622207 100644
--- a/core/java/android/app/usage/NetworkStats.java
+++ b/core/java/android/app/usage/NetworkStats.java
@@ -151,21 +151,6 @@
         public static final int UID_TETHERING = TrafficStats.UID_TETHERING;
 
         /**
-         * Combined usage across all metering states.
-         */
-        public static final int METERING_ALL = -1;
-
-        /**
-         * Usage not accounted for in any other metering state.
-         */
-        public static final int METERING_DEFAULT = 0x1;
-
-        /**
-         * Metered usage.
-         */
-        public static final int METERING_METERED = 0x2;
-
-        /**
          * Combined usage across all roaming states.
          */
         public static final int ROAMING_ALL = -1;
@@ -182,7 +167,6 @@
 
         private int mUid;
         private int mState;
-        private int mMetering;
         private int mRoaming;
         private long mBeginTimeStamp;
         private long mEndTimeStamp;
@@ -247,18 +231,6 @@
         }
 
         /**
-         * Metering state. One of the following values:<p/>
-         * <ul>
-         * <li>{@link #METERING_ALL}</li>
-         * <li>{@link #METERING_DEFAULT}</li>
-         * <li>{@link #METERING_METERED}</li>
-         * </ul>
-         */
-        public int getMetering() {
-            return mMetering;
-        }
-
-        /**
          * Roaming state. One of the following values:<p/>
          * <ul>
          * <li>{@link #ROAMING_ALL}</li>
@@ -463,8 +435,6 @@
     private void fillBucketFromSummaryEntry(Bucket bucketOut) {
         bucketOut.mUid = Bucket.convertUid(mRecycledSummaryEntry.uid);
         bucketOut.mState = Bucket.convertState(mRecycledSummaryEntry.set);
-        // TODO: Implement metering tracking.
-        bucketOut.mMetering = Bucket.METERING_ALL;
         bucketOut.mRoaming = Bucket.convertRoaming(mRecycledSummaryEntry.roaming);
         bucketOut.mBeginTimeStamp = mStartTimeStamp;
         bucketOut.mEndTimeStamp = mEndTimeStamp;
@@ -512,7 +482,6 @@
                         mRecycledHistoryEntry);
                 bucketOut.mUid = Bucket.convertUid(getUid());
                 bucketOut.mState = Bucket.STATE_ALL;
-                bucketOut.mMetering = Bucket.METERING_ALL;
                 bucketOut.mRoaming = Bucket.ROAMING_ALL;
                 bucketOut.mBeginTimeStamp = mRecycledHistoryEntry.bucketStart;
                 bucketOut.mEndTimeStamp = mRecycledHistoryEntry.bucketStart +