fixing the build.

Change-Id: If746de3d0b8cf1c76c24c252eaa6ecec08ae687b
diff --git a/tests/tests/telephony/src/android/telephony/cts/TelephonyManagerTest.java b/tests/tests/telephony/src/android/telephony/cts/TelephonyManagerTest.java
index e0e1bfe..eb468d9 100644
--- a/tests/tests/telephony/src/android/telephony/cts/TelephonyManagerTest.java
+++ b/tests/tests/telephony/src/android/telephony/cts/TelephonyManagerTest.java
@@ -24,6 +24,7 @@
 import android.content.Context;
 import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
+import android.os.Build;
 import android.os.Looper;
 import android.os.cts.TestThread;
 import android.telephony.CellLocation;