Add audio adjustment fragment in a11y settings

Accessibility settings audio and on-screen text category restructure,
add audio adjustment fragment for related accessibility services.

Bug: 174829936
Test: atest AudioAdjustmentFragmentTest, atest AccessibilitySettingsTest
Change-Id: I8b4397d042a0e7ce1242f95319a6a25cc45f38bb

res/values/strings.xml

@@ -5237,6 +5237,8 @@
         <item quantity="one"><xliff:g id="number_device_count">%1$d</xliff:g> saved hearing aid</item>
         <item quantity="other"><xliff:g id="number_device_count">%1$d</xliff:g> saved hearing aids</item>
     </plurals>
+    <!-- Title for the accessibility audio adjustment page. [CHAR LIMIT=50] -->
+    <string name="accessibility_audio_adjustment_title">Audio adjustment</string>
 
     <!-- Preference's shortcut when enabled. [CHAR LIMIT=NONE] -->
     <string name="accessibility_summary_shortcut_enabled">Shortcut on</string>

res/xml/accessibility_audio_adjustment.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 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.
+-->
+
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:settings="http://schemas.android.com/apk/res-auto"
+    android:key="accessibility_audio_adjustment"
+    android:persistent="false"
+    android:title="@string/accessibility_audio_adjustment_title">
+
+    <SwitchPreference
+        android:key="toggle_primary_mono"
+        android:persistent="false"
+        android:summary="@string/accessibility_toggle_primary_mono_summary"
+        android:title="@string/accessibility_toggle_primary_mono_title"
+        settings:controller="com.android.settings.accessibility.PrimaryMonoPreferenceController"/>
+
+    <com.android.settings.accessibility.BalanceSeekBarPreference
+        android:key="seekbar_primary_balance"
+        android:persistent="false"
+        android:title="@string/accessibility_toggle_primary_balance_title"/>
+</PreferenceScreen>

res/xml/accessibility_settings.xml

@@ -100,18 +100,6 @@
             settings:searchable="false"
             settings:controller="com.android.settings.accessibility.LiveCaptionPreferenceController"/>
 
-        <SwitchPreference
-            android:key="toggle_primary_mono"
-            android:persistent="false"
-            android:summary="@string/accessibility_toggle_primary_mono_summary"
-            android:title="@string/accessibility_toggle_primary_mono_title"
-            settings:controller="com.android.settings.accessibility.PrimaryMonoPreferenceController"/>
-
-        <com.android.settings.accessibility.BalanceSeekBarPreference
-            android:key="seekbar_primary_balance"
-            android:persistent="false"
-            android:title="@string/accessibility_toggle_primary_balance_title"/>
-
         <Preference
             android:key="hearing_aid_preference"
             android:persistent="false"
@@ -119,6 +107,13 @@
             android:title="@string/accessibility_hearingaid_title"
             settings:controller="com.android.settings.accessibility.AccessibilityHearingAidPreferenceController"/>
 
+        <Preference
+            android:fragment="com.android.settings.accessibility.AudioAdjustmentFragment"
+            android:key="audio_adjustment_preference_screen"
+            android:persistent="false"
+            android:title="@string/accessibility_audio_adjustment_title"
+            settings:searchable="true"/>
+
         <Preference
             android:key="rtt_setting"
             android:summary="@string/summary_placeholder"

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

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2021 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.app.settings.SettingsEnums;
+
+import com.android.settings.R;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settingslib.search.SearchIndexable;
+
+/** Accessibility settings for audio adjustment. */
+@SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
+public class AudioAdjustmentFragment extends DashboardFragment {
+
+    private static final String TAG = "AudioAdjustmentFragment";
+
+    @Override
+    public int getMetricsCategory() {
+        return SettingsEnums.ACCESSIBILITY_AUDIO_ADJUSTMENT;
+    }
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.accessibility_audio_adjustment;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider(R.xml.accessibility_audio_adjustment);
+
+}

tests/robotests/src/com/android/settings/accessibility/AudioAdjustmentFragmentTest.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2021 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 com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.R;
+import com.android.settings.testutils.XmlTestUtils;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+import java.util.List;
+
+/** Tests for {@link AudioAdjustmentFragment}. */
+@RunWith(RobolectricTestRunner.class)
+public class AudioAdjustmentFragmentTest {
+
+    private Context mContext = ApplicationProvider.getApplicationContext();
+
+    @Test
+    public void getNonIndexableKeys_existInXmlLayout() {
+        final List<String> niks = AudioAdjustmentFragment.SEARCH_INDEX_DATA_PROVIDER
+                .getNonIndexableKeys(mContext);
+        final List<String> keys =
+                XmlTestUtils.getKeysFromPreferenceXml(mContext,
+                        R.xml.accessibility_audio_adjustment);
+
+        assertThat(keys).containsAtLeastElementsIn(niks);
+    }
+}