Sort imports

Having consistent import order will reduce chance of merge
conflict between internal and external master

Test: rebuild
Change-Id: I0b1a170967ddcce7f388603fd521f6ed1eeba30b

tests/robotests/src/com/android/settings/vpn2/AppDialogFragmentTest.java

@@ -21,6 +21,8 @@ import static org.mockito.Mockito.verify;
 
 import android.content.pm.PackageInfo;
 
+import androidx.fragment.app.Fragment;
+
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
 
 import org.junit.Before;
@@ -29,8 +31,6 @@ import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import androidx.fragment.app.Fragment;
-
 @RunWith(SettingsRobolectricTestRunner.class)
 public class AppDialogFragmentTest {