[Test][Batch] Batch SignOutDialogRenderTest

This CL batches SignOutDialogRenderTest.

Bug: 1120258
Change-Id: If64cb7472e2abea0ccb0f613e1597a8aeff83da2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2587735Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Commit-Queue: Alice Wang <aliceywang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836605}

chrome/android/javatests/src/org/chromium/chrome/browser/signin/SignOutDialogRenderTest.java

@@ -25,6 +25,7 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 
+import org.chromium.base.test.util.Batch;
 import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.Feature;
 import org.chromium.base.test.util.JniMocker;
@@ -45,6 +46,7 @@ import org.chromium.ui.test.util.DummyUiActivityTestCase;
  */
 @RunWith(ChromeJUnit4ClassRunner.class)
 @CommandLineFlags.Add({ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE})
+@Batch(Batch.PER_CLASS)
 public class SignOutDialogRenderTest extends DummyUiActivityTestCase {
     private static final String TEST_DOMAIN = "test.domain.example.com";