Add a empty page to host Safety/emergency settings

The page will eventually be displayed on settings root. It's currently
disabled to avoid QA/dogfood confusion, as the page is pretty empty at
this point.

Bug: 175158310
Test: manual only. Skipped robolectric because the page is pretty empty.
      Will add more test as we build business logic.
Change-Id: I80f193f6e90b89ab0c37d0f23f7174e4ba86c091

src/com/android/settings/dashboard/DashboardFragmentRegistry.java

@@ -29,6 +29,7 @@ import com.android.settings.development.DevelopmentSettingsDashboardFragment;
 import com.android.settings.deviceinfo.StorageDashboardFragment;
 import com.android.settings.deviceinfo.aboutphone.MyDeviceInfoFragment;
 import com.android.settings.display.NightDisplaySettings;
+import com.android.settings.emergency.EmergencyDashboardFragment;
 import com.android.settings.enterprise.EnterprisePrivacySettings;
 import com.android.settings.fuelgauge.PowerUsageSummary;
 import com.android.settings.fuelgauge.SmartBatterySettings;
@@ -81,6 +82,8 @@ public class DashboardFragmentRegistry {
                 CategoryKey.CATEGORY_BATTERY);
         PARENT_TO_CATEGORY_KEY_MAP.put(DisplaySettings.class.getName(),
                 CategoryKey.CATEGORY_DISPLAY);
+        PARENT_TO_CATEGORY_KEY_MAP.put(EmergencyDashboardFragment.class.getName(),
+                CategoryKey.CATEGORY_EMERGENCY);
         PARENT_TO_CATEGORY_KEY_MAP.put(SoundSettings.class.getName(),
                 CategoryKey.CATEGORY_SOUND);
         PARENT_TO_CATEGORY_KEY_MAP.put(StorageDashboardFragment.class.getName(),

src/com/android/settings/emergency/EmergencyDashboardFragment.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2021 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.emergency;
+
+import android.app.settings.SettingsEnums;
+
+import com.android.settings.R;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settingslib.search.SearchIndexable;
+
+
+/**
+ * {@link DashboardFragment} that hosts emergency/safety related settings.
+ */
+@SearchIndexable
+public class EmergencyDashboardFragment extends DashboardFragment {
+
+    private static final String TAG = "EmergencyDashboard";
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.emergency_settings;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return SettingsEnums.EMERGENCY_SOS_GESTURE_SETTINGS;
+    }
+
+    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
+            new BaseSearchIndexProvider(R.xml.emergency_settings);
+}

src/com/android/settings/emergency/OWNERS

@@ -0,0 +1 @@
+zhfan@google.com