Updates messages for hearing devices related page

1. Removes the footer in hearing devices page
2. Moves the footer message to top intro of hearing devices pairing
   page

Bug: 321840161
Test: build pass, only simple UI change
Change-Id: I0554f0e6d12f78c1df3efba23792e9c0dc3f061f

res/values/strings.xml

@@ -5143,8 +5143,6 @@
     <string name="accessibility_hearingaid_more_device_summary"><xliff:g id="device_name" example="GN Hearing Aids">%1$s</xliff:g> +1 more</string>
     <!-- Title for the hearing device pairing preference. [CHAR LIMIT=20] -->
     <string name="accessibility_hearing_device_pairing_title">Pair new device</string>
-    <!-- Title for accessibility pair new hearing device page footer. [CHAR LIMIT=60] -->
-    <string name="accessibility_pair_hearing_device_about_title">About Pair new device</string>
     <!-- Title for the preference category containing the connected hearing device group. [CHAR LIMIT=20]-->
     <string name="accessibility_hearing_device_connected_title">Hearing devices</string>
     <!-- Title for the preference category containing the previously connected hearing device group. [CHAR LIMIT=20]-->
@@ -5159,10 +5157,10 @@
     <string name="accessibility_hac_mode_summary">Improves compatibility with telecoils and reduces unwanted noise</string>
     <!-- Title for accessibility hearing device page footer. [CHAR LIMIT=40] -->
     <string name="accessibility_hearing_device_about_title">About hearing devices</string>
-    <!-- Description for text in accessibility hearing aids footer. [CHAR LIMIT=NONE] -->
-    <string name="accessibility_hearing_device_footer_summary">Make sure your hearing device is turned on and ready to pair. Only ASHA and LE Audio hearing devices show on this page.</string>
     <!-- Title for the pair hearing device page. [CHAR LIMIT=25] -->
     <string name="accessibility_hearing_device_pairing_page_title">Pair hearing device</string>
+    <!-- Subtitle for the pair hearing device page. [CHAR LIMIT=NONE] -->
+    <string name="accessibility_hearing_device_pairing_intro">You can pair ASHA and LE Audio hearing devices on this page. Make sure your hearing device is turned on and ready to pair.</string>
     <!-- Title for the preference category containing the list of the available hearing during and after bluetooth scanning devices. [CHAR LIMIT=30] -->
     <string name="accessibility_found_hearing_devices">Available hearing devices</string>
     <!-- Title for the preference category containing the all bluetooth devices during and after bluetooth scanning devices. Used when people can not find their hearing device in hearing device pairing list. [CHAR LIMIT=45] -->

res/xml/accessibility_hearing_aids.xml

@@ -60,11 +60,4 @@
             settings:searchable="true"
             settings:controller="com.android.settings.accessibility.HearingAidCompatibilityPreferenceController"/>
     </PreferenceCategory>
-
-    <com.android.settings.accessibility.AccessibilityFooterPreference
-        android:key="hearing_device_footer"
-        android:title="@string/accessibility_hearing_device_footer_summary"
-        android:selectable="false"
-        settings:searchable="false"
-        settings:controller="com.android.settings.accessibility.HearingDeviceFooterPreferenceController"/>
 </PreferenceScreen>

res/xml/hearing_device_pairing_detail.xml

@@ -32,12 +32,4 @@
             settings:useAdminDisabledSummary="true"
             settings:controller="com.android.settings.accessibility.ViewAllBluetoothDevicesPreferenceController"/>
     </PreferenceCategory>
-
-    <com.android.settings.accessibility.AccessibilityFooterPreference
-        android:key="hearing_device_footer"
-        android:title="@string/accessibility_hearing_device_footer_summary"
-        android:selectable="false"
-        settings:searchable="false"
-        settings:controller="com.android.settings.accessibility.PairHearingDeviceFooterPreferenceController"/>
-
 </PreferenceScreen>

res/xml/hearing_device_pairing_fragment.xml

@@ -19,6 +19,10 @@
     xmlns:settings="http://schemas.android.com/apk/res-auto"
     android:title="@string/bluetooth_pairing_pref_title">
 
+    <com.android.settingslib.widget.TopIntroPreference
+        settings:searchable="false"
+        android:title="@string/accessibility_hearing_device_pairing_intro" />
+
     <com.android.settings.bluetooth.BluetoothProgressCategory
         android:key="available_hearing_devices"
         android:title="@string/accessibility_found_hearing_devices" />
@@ -35,11 +39,4 @@
             settings:controller="com.android.settings.accessibility.ViewAllBluetoothDevicesPreferenceController"/>
     </PreferenceCategory>
 
-    <com.android.settings.accessibility.AccessibilityFooterPreference
-        android:key="hearing_device_footer"
-        android:title="@string/accessibility_hearing_device_footer_summary"
-        android:selectable="false"
-        settings:searchable="false"
-        settings:controller="com.android.settings.accessibility.PairHearingDeviceFooterPreferenceController"/>
-
 </PreferenceScreen>

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

@@ -1,35 +0,0 @@
-/*
- * 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.content.Context;
-
-import com.android.settings.R;
-
-/** Preference controller for footer in pair hearing device page. */
-public class PairHearingDeviceFooterPreferenceController extends
-        AccessibilityFooterPreferenceController {
-    public PairHearingDeviceFooterPreferenceController(Context context,
-            String key) {
-        super(context, key);
-    }
-
-    @Override
-    protected String getIntroductionTitle() {
-        return mContext.getString(R.string.accessibility_pair_hearing_device_about_title);
-    }
-}