[RESTRICT AUTOMERGE] Fix testTraverseAllWindows with waterfull cutout

If the device has a waterfull cutout, Launcher window
would be temporary in the window list but the root node is
invisible since the exiting animation is not finished.

In this test, our intention is to test the App window we launch
and other persistent system windows, so we skip the App window that
is not launched within the test.

Bug: 175192940
Test: Enable waterfull cutout and run AccessibilityWindowQueryTest
Change-Id: I8ce053f1585cb920c6911cf7269ce33d5fa35d76
1 file changed