Convert FingerSelectionUiTest to JUnit 4

import androidx.test.filters.LargeTest;

import com.android.documentsui.files.FilesActivity;

import com.android.documentsui.rules.TestFilesRule;

import org.junit.Before;

import org.junit.Rule;

import org.junit.Test;

@LargeTest

public class FingerSelectionUiTest extends ActivityTest<FilesActivity> {

public class FingerSelectionUiTest extends ActivityTestJunit4<FilesActivity> {

    public FingerSelectionUiTest() {

        super(FilesActivity.class);

    }

    @Rule

    public final TestFilesRule mTestFilesRule = new TestFilesRule();

    @Override

    public void setUp() throws Exception {

        super.setUp();

        initTestFiles();

    @Before

    public void setUpTest() {

        bots.roots.closeDrawer();

    }

    @Test

    public void testFingerSelection_outOfRange() throws Exception {

        bots.main.switchToGridMode();

        Rect dirListBounds = bots.directory.findDocumentsList().getBounds();