Settings: Re-enable WebViewAppPickerTest#testNotFinishedIfAdmin

Since the time the test was ignored, this tests seems to have
self-resolved and now passes.

Bug: b/313615637
Test: atest SettingsRoboTests:com.android.settings.webview.WebViewAppPickerTest#testNotFinishedIfAdmin
Flag: TEST_ONLY
Change-Id: I3cd0595fd1a89ee944cd6c8e650c84b4ecdeb99f

tests/robotests/src/com/android/settings/webview/WebViewAppPickerTest.java

@@ -48,7 +48,6 @@ import com.android.settingslib.widget.SelectorWithWidgetPreference;
 
 import org.junit.After;
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
@@ -210,7 +209,6 @@ public class WebViewAppPickerTest {
         verify(mActivity, times(1)).finish();
     }
 
-    @Ignore("b/313615637")
     @Test
     public void testNotFinishedIfAdmin() {
         mUserManager.setIsAdminUser(true);