This is getting off-topic but no, that's not how it works. Android handles those chat heads as system-level windows, you don't need to know what's underneath th

This is getting off-topic but no, that's not how it works. Android handles those chat heads as system-level windows, you don't need to know what's underneath them. The running apps list is for that "Last app" functionality (though I've no idea why reordering is needed).