Move HandwritingInitiatorTest to the stylus folder

/*

 * Copyright (C) 2021 The Android Open Source Project

 * Copyright (C) 2022 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * limitations under the License.

 */

package android.view;

package android.view.stylus;

import static android.view.MotionEvent.ACTION_DOWN;

import static android.view.MotionEvent.ACTION_MOVE;

import android.content.Context;

import android.graphics.Rect;

import android.platform.test.annotations.Presubmit;

import android.view.HandwritingInitiator;

import android.view.InputDevice;

import android.view.MotionEvent;

import android.view.View;

import android.view.ViewConfiguration;

import android.view.ViewGroup;

import android.view.inputmethod.InputMethodManager;

import androidx.test.ext.junit.runners.AndroidJUnit4;

 * Tests for {@link HandwritingInitiator}

 *

 * Build/Install/Run:

 *  atest FrameworksCoreTests:HandwritingInitiatorTest

 *  atest FrameworksCoreTests:android.view.stylus.HandwritingInitiatorTest

 */

@Presubmit

@SmallTest