Migrate service-statsd off IoUtils

There's an equivalent public method in FileUtils, so use that
one instead for now.

Note that the method is deprecated, so there may be reason to
move off it altogether.

Bug: 146757305
Test: m
Change-Id: Ia4f29a255bd02e16c1fa8be331d3e7834a2cefdc

apex/statsd/service/java/com/android/server/stats/StatsCompanionService.java

@@ -30,6 +30,7 @@ import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.os.Binder;
 import android.os.Bundle;
+import android.os.FileUtils;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.IBinder;
@@ -47,8 +48,6 @@ import android.util.proto.ProtoOutputStream;
 
 import com.android.internal.annotations.GuardedBy;
 
-import libcore.io.IoUtils;
-
 import java.io.File;
 import java.io.FileDescriptor;
 import java.io.FileOutputStream;
@@ -226,7 +225,7 @@ public class StatsCompanionService extends IStatsCompanionService.Stub {
                     Log.d(TAG, "Sent data for " + numRecords + " apps");
                 }
             } finally {
-                IoUtils.closeQuietly(fout);
+                FileUtils.closeQuietly(fout);
                 backgroundThread.quit();
                 backgroundThread.interrupt();
             }