Adds Assistant Sandbox tutorial.

Demo: https://drive.google.com/open?id=1onivF9qKdgJeUG2ROkQBxcgi-l0VfC4f

Fixes: 157824552

Change-Id: Ia0e5f46b39e3f06feed2f7e175ab7861e9d51a96

quickstep/src/com/android/quickstep/interaction/AssistantGestureTutorialFragment.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2020 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.quickstep.interaction;
+
+import android.view.MotionEvent;
+import android.view.View;
+
+import com.android.launcher3.R;
+import com.android.quickstep.interaction.TutorialController.TutorialType;
+
+/** Shows the Home gesture interactive tutorial. */
+public class AssistantGestureTutorialFragment extends TutorialFragment {
+    @Override
+    int getHandAnimationResId() {
+        return R.drawable.assistant_gesture;
+    }
+
+    @Override
+    TutorialController createController(TutorialType type) {
+        return new AssistantGestureTutorialController(this, type);
+    }
+
+    @Override
+    Class<? extends TutorialController> getControllerClass() {
+        return AssistantGestureTutorialController.class;
+    }
+
+    @Override
+    public boolean onTouch(View view, MotionEvent motionEvent) {
+        if (motionEvent.getAction() == MotionEvent.ACTION_DOWN && mTutorialController != null) {
+            mTutorialController.setRippleHotspot(motionEvent.getX(), motionEvent.getY());
+        }
+        return super.onTouch(view, motionEvent);
+    }
+}