Address the flakiness in AnrHelperTest

import static android.testing.DexmakerShareClassLoaderRule.runWithDexmakerShareClassLoader;

import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;

import static org.mockito.ArgumentMatchers.eq;

import static org.mockito.Mockito.mock;

import static org.mockito.Mockito.timeout;

import static org.mockito.Mockito.verify;

import android.content.Context;

import android.content.pm.ApplicationInfo;

import android.os.Handler;

import android.platform.test.annotations.Presubmit;

import androidx.test.filters.SmallTest;

import com.android.server.appop.AppOpsService;

import com.android.server.wm.WindowProcessController;

import org.junit.Before;

import org.junit.Rule;

import org.junit.Test;

import java.io.File;

import java.lang.reflect.Field;

import java.lang.reflect.Modifier;

import java.util.concurrent.TimeUnit;

@SmallTest

@Presubmit

public class AnrHelperTest {

    private final AnrHelper mAnrHelper = new AnrHelper(mock(ActivityManagerService.class));

    private AnrHelper mAnrHelper;

    private ProcessRecord mAnrApp;

    @Rule

    public ServiceThreadRule mServiceThreadRule = new ServiceThreadRule();

    @Before

    public void setUp() {

        final Context context = getInstrumentation().getTargetContext();

        runWithDexmakerShareClassLoader(() -> {

            mAnrApp = mock(ProcessRecord.class);

            final ActivityManagerService service = mock(ActivityManagerService.class);

            final ProcessErrorStateRecord errorState = mock(ProcessErrorStateRecord.class);

            setFieldValue(ProcessErrorStateRecord.class, errorState, "mProcLock",

                    new ActivityManagerProcLock());

            setFieldValue(ProcessRecord.class, mAnrApp, "mErrorState", errorState);

            final ActivityManagerService service = new ActivityManagerService(

                    new ActivityManagerService.Injector(context) {

                    @Override

                    public AppOpsService getAppOpsService(File file, Handler handler) {

                        return null;

                    }

                    @Override

                    public Handler getUiHandler(ActivityManagerService service) {

                        return mServiceThreadRule.getThread().getThreadHandler();

                    }

                }, mServiceThreadRule.getThread());

            mAnrHelper = new AnrHelper(service);

        });

    }