Rename MtpManagerMock with TestMtpManager.

public class MtpDocumentsProviderTest extends AndroidTestCase {

    private ContentResolver mResolver;

    private MtpDocumentsProvider mProvider;

    private MtpManagerMock mMtpManager;

    private TestMtpManager mMtpManager;

    @Override

    public void setUp() {

        mResolver = new ContentResolver();

        mMtpManager = new MtpManagerMock(getContext());

        mMtpManager = new TestMtpManager(getContext());

        mProvider = new MtpDocumentsProvider();

        mProvider.onCreateForTesting(mMtpManager, mResolver);

    }

import java.util.Set;

import java.util.TreeSet;

public class MtpManagerMock extends MtpManager {

public class TestMtpManager extends MtpManager {

    private final Set<Integer> mValidDevices = new HashSet<Integer>();

    private final Set<Integer> mOpenedDevices = new TreeSet<Integer>();

    private final Map<Integer, MtpRoot[]> mRoots = new HashMap<Integer, MtpRoot[]>();

    MtpManagerMock(Context context) {

    TestMtpManager(Context context) {

        super(context);

    }