Disable flaky test

Bug: 288591571
Bug: 290736037
Test: atest FlickerTestsOther
Change-Id: I7e744cd36e993426b19365743747f90cef693613

tests/FlickerTests/src/com/android/server/wm/flicker/activityembedding/open/OpenTrampolineActivityTest.kt

@@ -165,7 +165,6 @@ class OpenTrampolineActivityTest(flicker: LegacyFlickerTest) : ActivityEmbedding
 
     @FlakyTest(bugId = 290736037)
     /** Main activity should go from fullscreen to being a split with secondary activity. */
-    @Presubmit
     @Test
     fun mainActivityLayerGoesFromFullscreenToSplit() {
         flicker.assertLayers {
@@ -197,6 +196,12 @@ class OpenTrampolineActivityTest(flicker: LegacyFlickerTest) : ActivityEmbedding
         }
     }
 
+    @FlakyTest(bugId = 288591571)
+    @Test
+    override fun visibleLayersShownMoreThanOneConsecutiveEntry() {
+        super.visibleLayersShownMoreThanOneConsecutiveEntry()
+    }
+
     companion object {
         /** {@inheritDoc} */
         private var startDisplayBounds = Rect.EMPTY