Dissmissing AccessibilityMenu through additional means (Screen turning off, back key, touch events elsewhere on the screen).

Bug: 261252772
Test: adb install the app, then enable from Settings Accessibility page.
Change-Id: I61e6556c005c3ab429b7e1eca6e40647cb47db4f

packages/SystemUI/accessibility/accessibilitymenu/src/com/android/systemui/accessibility/accessibilitymenu/AccessibilityMenuService.java

@@ -18,11 +18,17 @@ package com.android.systemui.accessibility.accessibilitymenu;
 
 import android.accessibilityservice.AccessibilityButtonController;
 import android.accessibilityservice.AccessibilityService;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
 import android.content.res.Configuration;
 import android.hardware.display.DisplayManager;
 import android.os.Handler;
+import android.os.Looper;
 import android.os.SystemClock;
 import android.view.Display;
+import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.accessibility.AccessibilityEvent;
@@ -69,7 +75,7 @@ public class AccessibilityMenuService extends AccessibilityService
     };
 
     // Update layout.
-    private final Handler mHandler = new Handler(getMainLooper());
+    private final Handler mHandler = new Handler(Looper.getMainLooper());
     private final Runnable mOnConfigChangedRunnable = new Runnable() {
         @Override
         public void run() {
@@ -92,11 +98,7 @@ public class AccessibilityMenuService extends AccessibilityService
         getAccessibilityButtonController().registerAccessibilityButtonCallback(
                 new AccessibilityButtonController.AccessibilityButtonCallback() {
                     /**
-                     * Called when the accessibility button in the system's navigation
-                     * area is clicked.
-                     *
-                     * @param controller the controller used to register for this
-                     *                   callback
+                     * {@inheritDoc}
                      */
                     @Override
                     public void onClicked(AccessibilityButtonController controller) {
@@ -107,19 +109,7 @@ public class AccessibilityMenuService extends AccessibilityService
                     }
 
                     /**
-                     * Called when the availability of the accessibility button in the
-                     * system's
-                     * navigation area has changed. The accessibility button may become
-                     * unavailable
-                     * because the device shopped showing the button, the button was
-                     * assigned to another
-                     * service, or for other reasons.
-                     *
-                     * @param controller the controller used to register for this
-                     *                   callback
-                     * @param available  {@code true} if the accessibility button is
-                     *                   available to this
-                     *                   service, {@code false} otherwise
+                     * {@inheritDoc}
                      */
                     @Override
                     public void onAvailabilityChanged(AccessibilityButtonController controller,
@@ -141,8 +131,12 @@ public class AccessibilityMenuService extends AccessibilityService
     protected void onServiceConnected() {
         mA11yMenuLayout = new A11yMenuOverlayLayout(this);
 
-        // Temporary measure to force visibility
-        mA11yMenuLayout.toggleVisibility();
+        registerReceiver(new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                mA11yMenuLayout.hideMenu();
+            }}, new IntentFilter(Intent.ACTION_SCREEN_OFF)
+        );
 
         mDisplayManager = getSystemService(DisplayManager.class);
         mDisplayManager.registerDisplayListener(mDisplayListener, null);
@@ -183,6 +177,14 @@ public class AccessibilityMenuService extends AccessibilityService
     public void onInterrupt() {
     }
 
+    @Override
+    protected boolean onKeyEvent(KeyEvent event) {
+        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
+            mA11yMenuLayout.hideMenu();
+        }
+        return false;
+    }
+
     @Override
     public boolean onTouch(View v, MotionEvent event) {
         if (event.getAction() == MotionEvent.ACTION_OUTSIDE) {