Disable flaky AR test due to crash in libarcore

Tbr: bialpio@chromium.org
Bug: 1153305
Change-Id: I20476991fdfa7c91328122b5f5be5402574fb00c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2607402Reviewed-by: Justin DeWitt <dewittj@chromium.org>
Commit-Queue: Justin DeWitt <dewittj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#839816}

chrome/android/javatests/src/org/chromium/chrome/browser/vr/WebXrArAnchorsTest.java

@@ -68,6 +68,7 @@ public class WebXrArAnchorsTest {
      */
     @Test
     @MediumTest
+    @DisabledTest(message = "https://crbug.com/1153305")
     @XrActivityRestriction({XrActivityRestriction.SupportedActivity.ALL})
     @ArPlaybackFile("chrome/test/data/xr/ar_playback_datasets/floor_session_12s_30fps.mp4")
     public void testHitTestAnchorSucceedsWithPlane() {