Add Panic button sound preference to panic gesture settings page.

Also renamed emergency_sos_* to panic_*. "emergency sos" is used by
other OEMs.

https://screenshot.googleplex.com/66097f3e-6aa0-4e2f-afb8-22f278bb0ed7.png

Bug: 161394591
Test: robotests
Change-Id: I14a59399fe7192d305d89a86dc93380c1e4c8a1c

src/com/android/settings/gestures/PanicGestureSoundPreferenceController.java

@@ -0,0 +1,68 @@
+/*
+ * 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.gestures;
+
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.annotation.VisibleForTesting;
+
+import com.android.settings.R;
+import com.android.settings.core.TogglePreferenceController;
+
+/**
+ * Preference controller for emergency sos gesture setting
+ */
+public class PanicGestureSoundPreferenceController extends TogglePreferenceController {
+
+    @VisibleForTesting
+    static final int ON = 1;
+    @VisibleForTesting
+    static final int OFF = 0;
+
+    private static final String SECURE_KEY = Settings.Secure.PANIC_SOUND_ENABLED;
+
+    public PanicGestureSoundPreferenceController(Context context, String key) {
+        super(context, key);
+    }
+
+    private static boolean isGestureAvailable(Context context) {
+        return context.getResources()
+                .getBoolean(R.bool.config_show_panic_gesture_settings);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return isGestureAvailable(mContext) ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
+    }
+
+    @Override
+    public boolean isSliceable() {
+        return false;
+    }
+
+    @Override
+    public boolean isChecked() {
+        return Settings.Secure.getInt(mContext.getContentResolver(), SECURE_KEY, ON) == ON;
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        return Settings.Secure.putInt(mContext.getContentResolver(), SECURE_KEY,
+                isChecked ? ON : OFF);
+    }
+}