Developer option for Grammatical Gender

Bug: b/272626712
Test: Added and verified affected atests pass
Change-Id: Ie07f80d608b78dfce3309533ac02d9a907e5e7b4

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -744,6 +744,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new ContrastPreferenceController(
                 context, context.getSystemService(UiModeManager.class)));
         controllers.add(new ForceEnableNotesRolePreferenceController(context));
+        controllers.add(new GrammaticalGenderPreferenceController(context));
 
         return controllers;
     }

src/com/android/settings/development/GrammaticalGenderPreferenceController.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2020 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.development;
+
+import android.app.ActivityManager;
+import android.app.IActivityManager;
+import android.content.Context;
+import android.content.res.Configuration;
+import android.os.RemoteException;
+import android.os.SystemProperties;
+import android.text.TextUtils;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.ListPreference;
+import androidx.preference.Preference;
+
+import com.android.settings.R;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+/**
+ * Preference controller to control Grammatical Gender
+ */
+public class GrammaticalGenderPreferenceController extends DeveloperOptionsPreferenceController
+        implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
+
+    private static final String GRAMMATICAL_GENDER_KEY =
+            "grammatical_gender";
+    @VisibleForTesting
+    static final String GRAMMATICAL_GENDER_PROPERTY = "persist.sys.grammatical_gender";
+    private final String[] mListValues;
+    private final String[] mListSummaries;
+
+    private IActivityManager mActivityManager;
+
+    public GrammaticalGenderPreferenceController(Context context) {
+        this(context, ActivityManager.getService());
+    }
+
+    @VisibleForTesting
+    GrammaticalGenderPreferenceController(Context context,
+            IActivityManager activityManager) {
+        super(context);
+
+        mListValues = context.getResources().getStringArray(R.array.grammatical_gender_values);
+        mListSummaries = context.getResources().getStringArray(R.array.grammatical_gender_entries);
+        mActivityManager = activityManager;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return GRAMMATICAL_GENDER_KEY;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        SystemProperties.set(GRAMMATICAL_GENDER_PROPERTY, newValue.toString());
+        updateState(mPreference);
+        try {
+            Configuration config = mActivityManager.getConfiguration();
+            config.setGrammaticalGender(Integer.parseInt(newValue.toString()));
+            mActivityManager.updatePersistentConfiguration(config);
+        } catch (RemoteException ex) {
+            // intentional no-op
+        }
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final ListPreference listPreference = (ListPreference) preference;
+        final String currentValue = SystemProperties.get(GRAMMATICAL_GENDER_PROPERTY);
+        int index = 0; // Defaults to Not Selected
+        for (int i = 0; i < mListValues.length; i++) {
+            if (TextUtils.equals(currentValue, mListValues[i])) {
+                index = i;
+                break;
+            }
+        }
+        listPreference.setValue(mListValues[index]);
+        listPreference.setSummary(mListSummaries[index]);
+    }
+}