Move 'Audio Output' to Accessibility hearing device page

* Extract the common part into HearingAidHelper.
* Remove abstract getHearingDevice(). Change to get the hearing device when needed.
* Move several classes from Bluetooth into Accessibility

Bug: 281783079
Test: make RunSettingsRoboTests ROBOTEST_FILTER="(HearingDeviceAudioRoutingBasePreferenceControllerTest|AccessibilityHearingAidPreferenceControllerTest|HearingAidHelperTest|HearingAidAudioRoutingPreferenceControllerTest|HearingDeviceCallRoutingPreferenceControllerTest)"
Change-Id: I79049107409b7086c6dcc8d48a6323e171ed1535

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

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2023 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 android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothProfile;
+import android.content.Context;
+
+import com.android.settingslib.bluetooth.CachedBluetoothDevice;
+import com.android.settingslib.bluetooth.CachedBluetoothDeviceManager;
+import com.android.settingslib.bluetooth.HapClientProfile;
+import com.android.settingslib.bluetooth.HearingAidProfile;
+import com.android.settingslib.bluetooth.LocalBluetoothManager;
+import com.android.settingslib.bluetooth.LocalBluetoothProfileManager;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * A helper class to get and check hearing aids and its status.
+ */
+public class HearingAidHelper {
+
+    private final BluetoothAdapter mBluetoothAdapter;
+    private final LocalBluetoothProfileManager mProfileManager;
+    private final CachedBluetoothDeviceManager mCachedDeviceManager;
+
+    public HearingAidHelper(Context context) {
+        final LocalBluetoothManager localBluetoothManager =
+                com.android.settings.bluetooth.Utils.getLocalBluetoothManager(context);
+        mProfileManager = localBluetoothManager.getProfileManager();
+        mCachedDeviceManager = localBluetoothManager.getCachedDeviceManager();
+        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+    }
+
+    /**
+     * Gets the connected hearing aids device whose profiles are
+     * {@link BluetoothProfile#HEARING_AID} or {@link BluetoothProfile#HAP_CLIENT}.
+     *
+     * @return a list of hearing aids {@link BluetoothDevice} objects
+     */
+    public List<BluetoothDevice> getConnectedHearingAidDeviceList() {
+        if (!isHearingAidSupported()) {
+            return new ArrayList<>();
+        }
+        final List<BluetoothDevice> deviceList = new ArrayList<>();
+        final HapClientProfile hapClientProfile = mProfileManager.getHapClientProfile();
+        if (hapClientProfile != null) {
+            deviceList.addAll(hapClientProfile.getConnectedDevices());
+        }
+        final HearingAidProfile hearingAidProfile = mProfileManager.getHearingAidProfile();
+        if (hearingAidProfile != null) {
+            deviceList.addAll(hearingAidProfile.getConnectedDevices());
+        }
+        return deviceList.stream()
+                .distinct()
+                .filter(d -> !mCachedDeviceManager.isSubDevice(d)).collect(Collectors.toList());
+    }
+
+    /**
+     * Gets the first connected hearing aids device.
+     *
+     * @return a {@link CachedBluetoothDevice} that is hearing aids device
+     */
+    public CachedBluetoothDevice getConnectedHearingAidDevice() {
+        final List<BluetoothDevice> deviceList = getConnectedHearingAidDeviceList();
+        return deviceList.isEmpty() ? null : mCachedDeviceManager.findDevice(deviceList.get(0));
+    }
+
+    /**
+     * Checks if {@link BluetoothProfile#HEARING_AID} or {@link BluetoothProfile#HAP_CLIENT}
+     * supported.
+     */
+    public boolean isHearingAidSupported() {
+        if (mBluetoothAdapter == null || !mBluetoothAdapter.isEnabled()) {
+            return false;
+        }
+        final List<Integer> supportedList = mBluetoothAdapter.getSupportedProfiles();
+        return supportedList.contains(BluetoothProfile.HEARING_AID)
+                || supportedList.contains(BluetoothProfile.HAP_CLIENT);
+    }
+
+    /**
+     * Checks if {@link BluetoothProfile#HEARING_AID} or {@link BluetoothProfile#HAP_CLIENT}
+     * profiles all ready.
+     */
+    public boolean isAllHearingAidRelatedProfilesReady() {
+        HearingAidProfile hearingAidProfile = mProfileManager.getHearingAidProfile();
+        if (hearingAidProfile != null && !hearingAidProfile.isProfileReady()) {
+            return false;
+        }
+        HapClientProfile hapClientProfile = mProfileManager.getHapClientProfile();
+        if (hapClientProfile != null && !hapClientProfile.isProfileReady()) {
+            return false;
+        }
+        return true;
+    }
+}