wifi: Handle wifi ap initial state before register intent

The intent WIFI_AP_STATE_CHANGED_ACTION is not sticky intent after
SC-V2, query wifi ap state and run intent handling after registering intent.

Bug: 231214355
Test: make RunSettingsRoboTests ROBOTEST_FILTER=Hotspot
Test: make RunSettingsRoboTests ROBOTEST_FILTER=Tether
Test: Manual test, the state shows correctly even if resume hotspot settings page from recent app.
Change-Id: Iab6b2b8628d725b003d5e5c4086420a329611745

src/com/android/settings/wifi/tether/WifiTetherSettings.java

@@ -159,6 +159,9 @@ public class WifiTetherSettings extends RestrictedDashboardFragment
         if (context != null) {
             context.registerReceiver(mTetherChangeReceiver, TETHER_STATE_CHANGE_FILTER,
                     Context.RECEIVER_EXPORTED_UNAUDITED);
+            // The intent WIFI_AP_STATE_CHANGED_ACTION is not sticky intent anymore after SC-V2
+            // Handle the initial state after register the receiver.
+            updateDisplayWithNewConfig();
         }
     }