Fix tests marked as UNIT_TESTS using ChromeBrowserTestRule

These tests are not unit tests, because they initialize the browser
process. Also they fail when unit tests reset ApplicationStatus.

Change-Id: Iefbc335a8d30ff8aa2ae8b6f1ba40318e2863163
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2622331
Auto-Submit: Michael Thiessen <mthiesse@chromium.org>
Commit-Queue: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842534}

chrome/android/javatests/src/org/chromium/chrome/browser/datareduction/DataReductionPromoUtilsTest.java

@@ -32,7 +32,7 @@ import org.chromium.chrome.test.ChromeBrowserTestRule;
  * Unit test suite for DataReductionPromoUtils.
  */
 @RunWith(BaseJUnit4ClassRunner.class)
-@Batch(Batch.UNIT_TESTS)
+@Batch(Batch.PER_CLASS)
 public class DataReductionPromoUtilsTest {
     @Rule
     public final ChromeBrowserTestRule mChromeBrowserTestRule = new ChromeBrowserTestRule();

chrome/android/javatests/src/org/chromium/chrome/browser/datareduction/settings/DataReductionStatsPreferenceTest.java

@@ -34,7 +34,7 @@ import org.chromium.chrome.test.ChromeBrowserTestRule;
  * Unit test suite for DataReductionStatsPreference.
  */
 @RunWith(BaseJUnit4ClassRunner.class)
-@Batch(Batch.UNIT_TESTS)
+@Batch(Batch.PER_CLASS)
 public class DataReductionStatsPreferenceTest {
     @Rule
     public final ChromeBrowserTestRule mChromeBrowserTestRule = new ChromeBrowserTestRule();

chrome/browser/optimization_guide/android/javatests/src/org/chromium/chrome/browser/optimization_guide/OptimizationGuideBridgeFactoryUnitTest.java

@@ -34,7 +34,7 @@ import java.util.Arrays;
  * Unit tests for OptimizationGuideBridgeFactory
  */
 @RunWith(BaseJUnit4ClassRunner.class)
-@Batch(Batch.UNIT_TESTS)
+@Batch(Batch.PER_CLASS)
 public class OptimizationGuideBridgeFactoryUnitTest {
     @Rule
     public JniMocker mocker = new JniMocker();