Remove unused import in ConnectivityManager

This makes the pre-upload verification pass.

Test: no functional change.
Change-Id: I6beccea10ccfcb39d975cb8f6f34fc9d79f1e170
diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index 6320134..234bef7 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -44,7 +44,6 @@
 import android.telephony.SubscriptionManager;
 import android.util.ArrayMap;
 import android.util.Log;
-import android.util.SparseArray;
 import android.util.SparseIntArray;
 
 import com.android.internal.telephony.ITelephony;