Promote passing OpenAppFromLockNotificationWarm tests

It's <1% flaky in presubmit for the past month

Bug: 203538234
Test: atest FlickerTests
Change-Id: I9bbb241ee903902929b8957d74dd9ad1cec76d64

tests/FlickerTests/src/com/android/server/wm/flicker/launch/OpenAppFromLockNotificationWarm.kt

@@ -127,9 +127,6 @@ class OpenAppFromLockNotificationWarm(flicker: FlickerTest) : OpenAppFromNotific
     @Ignore("Not applicable to this CUJ. Display starts locked and app is full screen at the end")
     override fun navBarWindowIsAlwaysVisible() {}
 
-    /** {@inheritDoc} */
-    @FlakyTest @Test override fun appWindowBecomesVisible() = super.appWindowBecomesVisible()
-
     /** {@inheritDoc} */
     @FlakyTest(bugId = 246284526)
     @Test