Bind action to fragment: adaptive notif settings

Bug: 330608738

Test: send high pri HUN => see edu HUN from sysui
      tap HUN/action => shows adaptive notif settings page,
                        notif menu key highlighted in split screen

Test: adb shell am start-activity -a android.settings.MANAGE_ADAPTIVE_NOTIFICATIONS

Flag: com.android.systemui.notification_avalanche_throttle_hun

Change-Id: I8bc36412b6ce6364887b04d737310e6b01478964
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index e3bb1a1..24d9525 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -303,6 +303,7 @@
     public static class UserSettingsActivity extends SettingsActivity { /* empty */ }
     public static class NotificationAccessSettingsActivity extends SettingsActivity { /* empty */ }
     public static class NotificationAccessDetailsActivity extends SettingsActivity { /* empty */ }
+    public static class ManageAdaptiveNotificationsActivity extends SettingsActivity { /* empty */ }
     public static class VrListenersSettingsActivity extends SettingsActivity { /* empty */ }
     public static class PremiumSmsAccessActivity extends SettingsActivity { /* empty */ }
     public static class PictureInPictureSettingsActivity extends SettingsActivity { /* empty */ }
diff --git a/src/com/android/settings/core/gateway/SettingsGateway.java b/src/com/android/settings/core/gateway/SettingsGateway.java
index 11c05f3..734bddc 100644
--- a/src/com/android/settings/core/gateway/SettingsGateway.java
+++ b/src/com/android/settings/core/gateway/SettingsGateway.java
@@ -156,6 +156,7 @@
 import com.android.settings.notification.ConfigureNotificationSettings;
 import com.android.settings.notification.NotificationAccessSettings;
 import com.android.settings.notification.NotificationAssistantPicker;
+import com.android.settings.notification.PoliteNotificationsPreferenceFragment;
 import com.android.settings.notification.SoundSettings;
 import com.android.settings.notification.app.AppBubbleNotificationSettings;
 import com.android.settings.notification.app.AppNotificationSettings;
@@ -314,6 +315,7 @@
             AppInfoDashboardFragment.class.getName(),
             BatterySaverSettings.class.getName(),
             AppNotificationSettings.class.getName(),
+            PoliteNotificationsPreferenceFragment.class.getName(),
             NotificationAssistantPicker.class.getName(),
             ChannelNotificationSettings.class.getName(),
             SatelliteSetting.class.getName(),