Update inclusive language for Accessibility Settings

Update language to comply with Android's inclusive language guidance
See https://source.android.com/setup/contribute/respectful-code for reference

Bug: 161896447
Test: robotest & manual
Change-Id: I67032d4beb7c8ae6b5a3271ea75ca38be4351484

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

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2019 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 android.os.UserHandle;
+import android.provider.Settings;
+
+import com.android.settings.core.TogglePreferenceController;
+
+/**
+ * A toggle preference controller for Primary Mono
+ */
+public class PrimaryMonoPreferenceController extends TogglePreferenceController {
+
+    public PrimaryMonoPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public boolean isChecked() {
+        return Settings.System.getIntForUser(mContext.getContentResolver(),
+                Settings.System.MASTER_MONO, 0 /* default */, UserHandle.USER_CURRENT) == 1;
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        return Settings.System.putIntForUser(mContext.getContentResolver(),
+                Settings.System.MASTER_MONO, isChecked ? 1 : 0, UserHandle.USER_CURRENT);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+}