[ToA]Cache system gender to reduce unnecessary IPC

Bug: 312324895
Test: atest TermsOfAddressNotSpecifiedControllerTest
atest TermsOfAddressNeutralControllerTest
atest TermsOfAddressMasculineControllerTest
atest TermsOfAddressFeminineControllerTest

Change-Id: Idee2cc1ece673092c94307b8812f032f7826c16a

src/com/android/settings/localepicker/TermsOfAddressHelper.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2024 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.localepicker;
+
+import android.app.GrammaticalInflectionManager;
+import android.content.Context;
+
+import androidx.annotation.NonNull;
+
+/**
+ * A helper used to get, set, and cache system grammatical gender.
+ */
+public class TermsOfAddressHelper {
+
+    private int mSystemGrammaticalGender;
+    private GrammaticalInflectionManager mGrammaticalInflectionManager;
+
+    public TermsOfAddressHelper(@NonNull Context context) {
+        mGrammaticalInflectionManager = context.getSystemService(
+                GrammaticalInflectionManager.class);
+        mSystemGrammaticalGender = mGrammaticalInflectionManager.getSystemGrammaticalGender();
+    }
+
+    /**
+     * set system grammatical gender
+     *
+     * @param gender system grammatical gender
+     */
+    public void setSystemGrammaticalGender(int gender) {
+        mGrammaticalInflectionManager.setSystemWideGrammaticalGender(gender);
+        mSystemGrammaticalGender = gender;
+    }
+
+    /**
+     * get system grammatical gender
+     */
+    public int getSystemGrammaticalGender() {
+        return mSystemGrammaticalGender;
+    }
+}