Unify shorthand for byte-based units.

Change-Id: If990859dee3f0973e1d4c48f05312c84071b3328
diff --git a/services/tests/servicestests/src/com/android/server/NetworkStatsServiceTest.java b/services/tests/servicestests/src/com/android/server/NetworkStatsServiceTest.java
index 8f5e77e..daf2018 100644
--- a/services/tests/servicestests/src/com/android/server/NetworkStatsServiceTest.java
+++ b/services/tests/servicestests/src/com/android/server/NetworkStatsServiceTest.java
@@ -31,6 +31,7 @@
 import static android.net.NetworkStatsHistory.FIELD_ALL;
 import static android.net.NetworkTemplate.buildTemplateMobileAll;
 import static android.net.NetworkTemplate.buildTemplateWifi;
+import static android.net.TrafficStats.MB_IN_BYTES;
 import static android.net.TrafficStats.UID_REMOVED;
 import static android.net.TrafficStats.UID_TETHERING;
 import static android.text.format.DateUtils.DAY_IN_MILLIS;
@@ -92,10 +93,6 @@
     private static final String IMSI_1 = "310004";
     private static final String IMSI_2 = "310260";
 
-    private static final long KB_IN_BYTES = 1024;
-    private static final long MB_IN_BYTES = 1024 * KB_IN_BYTES;
-    private static final long GB_IN_BYTES = 1024 * MB_IN_BYTES;
-
     private static NetworkTemplate sTemplateWifi = buildTemplateWifi();
     private static NetworkTemplate sTemplateImsi1 = buildTemplateMobileAll(IMSI_1);
     private static NetworkTemplate sTemplateImsi2 = buildTemplateMobileAll(IMSI_2);