Detects nav bar gestures to progress through Home tutorial.

Home gesture also exits Back and Home tutorials on the
completion screens (as does back gesture).

Test: Manually verified Back and Home tutorial flows.
Bug: 148542211
Change-Id: I8026745e875e9ccb8cfd60bc438213b2d896254d

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

@@ -21,6 +21,7 @@ import android.view.View;
 
 import com.android.launcher3.R;
 import com.android.quickstep.interaction.EdgeBackGestureHandler.BackGestureResult;
+import com.android.quickstep.interaction.NavBarGestureHandler.NavBarGestureResult;
 
 /** A {@link TutorialController} for the Home tutorial. */
 final class HomeGestureTutorialController extends TutorialController {
@@ -82,4 +83,21 @@ final class HomeGestureTutorialController extends TutorialController {
                 break;
         }
     }
+
+    @Override
+    public void onNavBarGestureAttempted(NavBarGestureResult result) {
+        switch (mTutorialType) {
+            case HOME_NAVIGATION:
+                if (result == NavBarGestureResult.HOME_GESTURE_COMPLETED) {
+                    hideHandCoachingAnimation();
+                    mTutorialFragment.changeController(HOME_NAVIGATION_COMPLETE);
+                }
+                break;
+            case HOME_NAVIGATION_COMPLETE:
+                if (result == NavBarGestureResult.HOME_GESTURE_COMPLETED) {
+                    mTutorialFragment.closeTutorial();
+                }
+                break;
+        }
+    }
 }