[VR] Disable a VR test class for <Oreo.

Disable all tests in VrBrowserJavaScriptModalDialogTest before Android
Oreo, where they are very flaky.  They are solid on O+.

BUG=1034735
TBR=tedchoc@chromium.org

Change-Id: Icf2a34ea2ec2f682484afe5dc1e63af3ccdb5987
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1986954Reviewed-by: Donn Denman <donnd@chromium.org>
Commit-Queue: Donn Denman <donnd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#728355}

chrome/android/javatests/src/org/chromium/chrome/browser/vr/jsdialog/VrBrowserJavaScriptModalDialogTest.java

@@ -9,6 +9,7 @@ import static org.chromium.chrome.browser.vr.XrTestFramework.POLL_TIMEOUT_LONG_M
 import static org.chromium.chrome.browser.vr.XrTestFramework.POLL_TIMEOUT_SHORT_MS;
 import static org.chromium.chrome.test.util.ChromeRestriction.RESTRICTION_TYPE_VIEWER_DAYDREAM;
 
+import android.os.Build;
 import android.support.test.filters.MediumTest;
 
 import org.junit.Assert;
@@ -18,6 +19,7 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 
 import org.chromium.base.test.util.CommandLineFlags;
+import org.chromium.base.test.util.DisableIf;
 import org.chromium.base.test.util.Feature;
 import org.chromium.base.test.util.Restriction;
 import org.chromium.chrome.browser.ChromeSwitches;
@@ -40,6 +42,8 @@ import java.io.IOException;
 @RunWith(ChromeJUnit4ClassRunner.class)
 @CommandLineFlags.Add({ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE})
 @Restriction(RESTRICTION_TYPE_VIEWER_DAYDREAM)
+@DisableIf.Build(message = "Flaky on M, but solid thereafter.  https://crbug.com/1034735",
+                 sdk_is_less_than = Build.VERSION_CODES.O)
 public class VrBrowserJavaScriptModalDialogTest {
     @Rule
     public ChromeTabbedActivityVrTestRule mActivityTestRule = new ChromeTabbedActivityVrTestRule();