Create a new apps page for silky home

- Change recent apps to the list view.
- Remove Conversations, Notifications and Permission manager.
- Remove Wireless emergency alerts and Special app access.
- Show App info preference if there's no recent apps.
- Show general category with recent apps.
- Use this page as the new apps entry on homepage for silky home.
- Make old apps page unsearchable when silky home is enabled.
- Exported new apps page in AndroidManifest.

Bug: 168166015
Bug: 174964405
Test: robotest & visual
Change-Id: I50d35a9d4723612214fce45a9e129fc175bc6831

src/com/android/settings/applications/AppAndNotificationDashboardFragment.java

@@ -67,10 +67,6 @@ public class AppAndNotificationDashboardFragment extends DashboardFragment
 
     @Override
     protected int getPreferenceScreenResId() {
-        // TODO(b/168166015): Remove this when the new Apps page ready.
-        if (FeatureFlagUtils.isEnabled(getContext(), FeatureFlags.SILKY_HOME)) {
-            return R.xml.apps;
-        }
         return R.xml.app_and_notification;
     }
 
@@ -142,5 +138,14 @@ public class AppAndNotificationDashboardFragment extends DashboardFragment
                         Context context) {
                     return buildPreferenceControllers(context);
                 }
+
+                @Override
+                protected boolean isPageSearchEnabled(Context context) {
+                    // TODO(b/174964405): This method should be removed when silky home launched.
+                    // This page is going to deprecate, we should make this page unsearchable
+                    // when the silky home is enabled, otherwise search results will contain the
+                    // old data and launch this page even if the silky home is enabled.
+                    return !FeatureFlagUtils.isEnabled(context, FeatureFlags.SILKY_HOME);
+                }
             };
 }