Mark OpenAppToSplitScreenTest focus test as flaky

From the logs, sometimes recents_animation_input_consumer
does not get focus. Disabling until we have a change to
investigate further.

Test: atest FlickerTests:OpenAppToSplitScreenTest
Bug: 151179149
Change-Id: I8e15f074a58fecf4f7059a4cd1d0135a98cc9770
diff --git a/tests/FlickerTests/src/com/android/server/wm/flicker/splitscreen/OpenAppToSplitScreenTest.kt b/tests/FlickerTests/src/com/android/server/wm/flicker/splitscreen/OpenAppToSplitScreenTest.kt
index e078f26..c2ebcc2 100644
--- a/tests/FlickerTests/src/com/android/server/wm/flicker/splitscreen/OpenAppToSplitScreenTest.kt
+++ b/tests/FlickerTests/src/com/android/server/wm/flicker/splitscreen/OpenAppToSplitScreenTest.kt
@@ -102,7 +102,8 @@
 
                 eventLog {
                     focusChanges(testApp.`package`,
-                            "recents_animation_input_consumer", "NexusLauncherActivity")
+                            "recents_animation_input_consumer", "NexusLauncherActivity",
+                            bugId = 151179149)
                 }
             }
         }