[Physical Keyboard][Setting] New pk a11y entry under a11y page

Add entry for physical keyboard a11y page under a11y setting

Bug: 345399212
Test: atest SettingsRoboTests
Flag: com.android.settings.keyboard.keyboard_and_touchpad_a11y_new_page_enabled
Change-Id: I0c59c3a9df1b5df5e22349ab3907f767682d6fb9

src/com/android/settings/inputmethod/PhysicalKeyboardA11yPreferenceController.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2024 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.settings.inputmethod;
+
+import static com.android.settings.keyboard.Flags.keyboardAndTouchpadA11yNewPageEnabled;
+
+import android.content.Context;
+import android.view.InputDevice;
+
+import com.android.settings.core.BasePreferenceController;
+
+/** Controller that shows and updates the Physical Keyboard a11y preference. */
+public class PhysicalKeyboardA11yPreferenceController extends BasePreferenceController {
+
+
+    public PhysicalKeyboardA11yPreferenceController(Context context,
+            String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return keyboardAndTouchpadA11yNewPageEnabled()
+                && isAnyHardKeyboardsExist() ? AVAILABLE : CONDITIONALLY_UNAVAILABLE;
+    }
+
+    private static boolean isAnyHardKeyboardsExist() {
+        for (int deviceId : InputDevice.getDeviceIds()) {
+            final InputDevice device = InputDevice.getDevice(deviceId);
+            if (device != null && !device.isVirtual() && device.isFullKeyboard()) {
+                return true;
+            }
+        }
+        return false;
+    }
+}