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
diff --git a/src/com/android/settings/dashboard/DashboardFragmentRegistry.java b/src/com/android/settings/dashboard/DashboardFragmentRegistry.java
index f8a4f39..2e326b0 100644
--- a/src/com/android/settings/dashboard/DashboardFragmentRegistry.java
+++ b/src/com/android/settings/dashboard/DashboardFragmentRegistry.java
@@ -29,6 +29,7 @@
 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 @@
                 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(),