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

tests/robotests/src/com/android/settings/gestures/PanicGesturePreferenceControllerTest.java

@@ -0,0 +1,112 @@
+/*
+ * 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 static com.android.settings.gestures.PanicGesturePreferenceController.OFF;
+import static com.android.settings.gestures.PanicGesturePreferenceController.ON;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.R;
+import com.android.settings.testutils.shadow.SettingsShadowResources;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.annotation.Config;
+
+@RunWith(RobolectricTestRunner.class)
+@Config(shadows = SettingsShadowResources.class)
+public class PanicGesturePreferenceControllerTest {
+
+
+    private Context mContext;
+    private ContentResolver mContentResolver;
+    private PanicGesturePreferenceController mController;
+    private static final String PREF_KEY = "gesture_panic_button";
+
+    @Before
+    public void setUp() {
+        mContext = ApplicationProvider.getApplicationContext();
+        mContentResolver = mContext.getContentResolver();
+        mController = new PanicGesturePreferenceController(mContext, PREF_KEY);
+    }
+
+    @After
+    public void tearDown() {
+        SettingsShadowResources.reset();
+    }
+
+    @Test
+    public void isAvailable_configIsTrue_shouldReturnTrue() {
+        SettingsShadowResources.overrideResource(
+                R.bool.config_show_panic_gesture_settings,
+                Boolean.TRUE);
+
+        assertThat(mController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void isAvailable_configIsTrue_shouldReturnFalse() {
+        SettingsShadowResources.overrideResource(
+                R.bool.config_show_panic_gesture_settings,
+                Boolean.FALSE);
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
+
+    @Test
+    public void isChecked_configIsNotSet_shouldReturnTrue() {
+        // Set the setting to be enabled.
+        Settings.Secure.putInt(mContentResolver, Settings.Secure.PANIC_GESTURE_ENABLED, ON);
+        mController = new PanicGesturePreferenceController(mContext, PREF_KEY);
+
+        assertThat(mController.isChecked()).isTrue();
+    }
+
+    @Test
+    public void isChecked_configIsSet_shouldReturnFalse() {
+        // Set the setting to be disabled.
+        Settings.Secure.putInt(mContentResolver, Settings.Secure.PANIC_GESTURE_ENABLED, OFF);
+        mController = new PanicGesturePreferenceController(mContext, PREF_KEY);
+
+        assertThat(mController.isChecked()).isFalse();
+    }
+
+    @Test
+    public void isSliceableCorrectKey_returnsTrue() {
+        final PanicGesturePreferenceController controller =
+                new PanicGesturePreferenceController(mContext, PREF_KEY);
+        assertThat(controller.isSliceable()).isTrue();
+    }
+
+    @Test
+    public void isSliceableIncorrectKey_returnsFalse() {
+        final DoubleTapPowerPreferenceController controller =
+                new DoubleTapPowerPreferenceController(mContext, "bad_key");
+        assertThat(controller.isSliceable()).isFalse();
+    }
+
+}