Add Instant hotspot preference

- Add Instant hotspot preference to Wi-Fi hotspot settings

- Wait onServiceConnected callback and then getSettingsState

- Use the PendingIntent provided by SharedConnectivitySettingsState to launch Instant hotspot settings

Bug: 268550769
Test: manual test
atest -c WifiTetherSettingsTest
atest -c WifiTetherViewModelTest \
         SharedConnectivityRepositoryTest

Change-Id: I343599e6127d9b1cb4af661dcc80a8683589c7b8

src/com/android/settings/wifi/factory/WifiFeatureProvider.java

@@ -26,6 +26,7 @@ import androidx.annotation.NonNull;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.lifecycle.ViewModelStoreOwner;
 
+import com.android.settings.wifi.repository.SharedConnectivityRepository;
 import com.android.settings.wifi.repository.WifiHotspotRepository;
 import com.android.settings.wifi.tether.WifiHotspotSecurityViewModel;
 import com.android.settings.wifi.tether.WifiHotspotSpeedViewModel;
@@ -44,6 +45,7 @@ public class WifiFeatureProvider {
     private TetheringManager mTetheringManager;
     private WifiVerboseLogging mWifiVerboseLogging;
     private WifiHotspotRepository mWifiHotspotRepository;
+    private SharedConnectivityRepository mSharedConnectivityRepository;
 
     public WifiFeatureProvider(@NonNull Context appContext) {
         mAppContext = appContext;
@@ -92,6 +94,17 @@ public class WifiFeatureProvider {
         return mWifiHotspotRepository;
     }
 
+    /**
+     * Gets SharedConnectivityRepository
+     */
+    public SharedConnectivityRepository getSharedConnectivityRepository() {
+        if (mSharedConnectivityRepository == null) {
+            mSharedConnectivityRepository = new SharedConnectivityRepository(mAppContext);
+            verboseLog(TAG, "getSharedConnectivityRepository():" + mSharedConnectivityRepository);
+        }
+        return mSharedConnectivityRepository;
+    }
+
     /**
      * Gets WifiTetherViewModel
      */