Fix a test broken by fragment migration.

Change-Id: I68e4f9b53d3492817ea9416fd4127fbe15337ce6
Fixes: 111193572
Test: robotests
diff --git a/tests/robotests/src/com/android/settings/password/ConfirmCredentialTest.java b/tests/robotests/src/com/android/settings/password/ConfirmCredentialTest.java
index 636248a..37c972a 100644
--- a/tests/robotests/src/com/android/settings/password/ConfirmCredentialTest.java
+++ b/tests/robotests/src/com/android/settings/password/ConfirmCredentialTest.java
@@ -20,25 +20,20 @@
 
 import com.android.settings.password.ConfirmDeviceCredentialBaseFragment.LastTryDialog;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
-import com.android.settings.testutils.shadow.SettingsShadowResources;
 
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.Robolectric;
-import org.robolectric.annotation.Config;
 
 import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
 
 @RunWith(SettingsRobolectricTestRunner.class)
-@Config(shadows = SettingsShadowResources.SettingsShadowTheme.class)
 public class ConfirmCredentialTest {
     @Test
-    @Ignore("b/111193572")
     public void testLastTryDialogShownExactlyOnce() {
         FragmentManager fm = Robolectric.buildActivity(FragmentActivity.class).
-                get().getSupportFragmentManager();
+                setup().get().getSupportFragmentManager();
 
         // Launch only one instance at a time.
         assertThat(LastTryDialog.show(