Migrate people settings to new modes UI

Flag: android.app.modes_ui
Bug: 337079247
Test: make -j RunSettingsRoboTests ROBOTEST_FILTER=com.android.settings.notification.modes
Change-Id: If5e7b82a006e856b4aceca7acdfc8cc0d11092a7

src/com/android/settings/notification/modes/ZenModesFragmentBase.java

@@ -57,9 +57,9 @@ abstract class ZenModesFragmentBase extends RestrictedDashboardFragment {
 
     @Override
     public void onAttach(@NonNull Context context) {
-        super.onAttach(context);
         mContext = context;
         mBackend = ZenModesBackend.getInstance(context);
+        super.onAttach(context);
     }
 
     @Override
@@ -77,6 +77,12 @@ abstract class ZenModesFragmentBase extends RestrictedDashboardFragment {
         }
     }
 
+    @Override
+    public void onResume() {
+        super.onResume();
+        updateZenModeState();
+    }
+
     @Override
     public void onStop() {
         super.onStop();