Map the new category keys to the corresponding fragment.

- map category night_light to NightDisplaySettings
- map category gestures to GestureSettings

Bug: 79530682
Bug: 79532703
Test: make RunSettingsRoboTests
Change-Id: Idc45957d2515e148226897f58fcc358a8c7f37dd

tests/robotests/src/com/android/settings/display/NightDisplaySettingsTest.java

@@ -22,6 +22,7 @@ import android.provider.SearchIndexableResource;
 import com.android.settings.R;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
 
+import com.android.settingslib.drawer.CategoryKey;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.RuntimeEnvironment;
@@ -45,4 +46,10 @@ public class NightDisplaySettingsTest {
 
         assertThat(indexedXml).contains(R.xml.night_display_settings);
     }
+
+    @Test
+    public void getCategoryKey_isCategoryNightLight() {
+        NightDisplaySettings settings = new NightDisplaySettings();
+        assertThat(settings.getCategoryKey()).isEqualTo(CategoryKey.CATEGORY_NIGHT_LIGHT);
+    }
 }