Fix NPE during unit test

As of ag/3932176 the slice indexer now queries getSummary() for each
controller. So we need to create all necessary objects before
getSummary(). In this case, the PSCD object.

Change-Id: I0162996be37d740f1e450880bf4698acd94ca0ad
Fixes: 78897071
Test: atest

src/com/android/settings/backup/BackupSettingsHelper.java

@@ -24,7 +24,6 @@ import android.content.Intent;
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.os.UserHandle;
-import androidx.annotation.VisibleForTesting;
 import android.util.Log;
 
 import com.android.settings.R;
@@ -32,6 +31,8 @@ import com.android.settings.Settings.PrivacySettingsActivity;
 
 import java.net.URISyntaxException;
 
+import androidx.annotation.VisibleForTesting;
+
 /**
  * Helper class for {@link BackupSettingsActivity} that interacts with {@link IBackupManager}.
  */