[hearing devices page] Add feature flag to control visibility of the hearing devices page

* Setup basic xml for hearing devices page

Bug: 237625815
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AccessibilityHearingAidsFragmentTest
Change-Id: I3cc794e124d1dfda46f8d5fba658de47f84b63f5

src/com/android/settings/accessibility/AccessibilityHearingAidsFragment.java

@@ -0,0 +1,68 @@
+/*
+ * 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.
+ * 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.accessibility;
+
+import static android.os.UserManager.DISALLOW_CONFIG_BLUETOOTH;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.android.settings.R;
+import com.android.settings.dashboard.RestrictedDashboardFragment;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settingslib.search.SearchIndexable;
+
+/** Accessibility settings for hearing aids. */
+@SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
+public class AccessibilityHearingAidsFragment extends RestrictedDashboardFragment {
+
+    private static final String TAG = "AccessibilityHearingAidsFragment";
+
+    public AccessibilityHearingAidsFragment() {
+        super(DISALLOW_CONFIG_BLUETOOTH);
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+            Bundle savedInstanceState) {
+        // TODO(b/237625815): Add shortcutPreference by extending
+        //  AccessibilityShortcutPreferenceFragment
+
+        return super.onCreateView(inflater, container, savedInstanceState);
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        // TODO(b/262839191): To be updated settings_enums.proto
+        return 0;
+    }
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.accessibility_hearing_aids;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider(R.xml.accessibility_hearing_aids);
+}