Ensure that shade moves to touched display before expanding

Updating handler for launcher swipe so that upon touching launcher
background, the shade first is reparented to the touched display before
attempting to open (only for flexiglass, for non-flexiglass then swiping
on launcher is ignored if coming from a different display then that
shade's current location)

Bug: 378685769
Test: atest StatusBarTouchShadeDisplayPolicyTest
Test: atest LauncherProxyServiceTest
Test: atest PhoneStatusBarViewControllerTest
Flag: com.android.systemui.shade_window_goes_around
Change-Id: I15fd5fb7227fad01eb9379b05946283f95ec49a3