Verify that hiding saw also hides sub windows

Instead of using a popup window we directly add a subwindow using the
token from the SAW window.

Bug: 333491197
Test: atest CtsWindowManagerDeviceWindow:HideOverlayWindowsTest
Flag: EXEMPT securityfix
Merged-In: Ibe5879b6e73cf139b9ec5affef255d2e6ad9176d
Change-Id: Ibe5879b6e73cf139b9ec5affef255d2e6ad9176d
(cherry picked from commit 823c561e29404161b6fd10ed709c7aa3b7b20940)
2 files changed