Window flag: invert the state of WindowManagerFlags.NotFocusable with respect to how this window interacts with the current method. That is, if FLAG_NOT_FOCUSABLE is set and this flag is set, then the window will behave as if it needs to interact with the input method and thus be placed behind/away from it; if FLAG_NOT_FOCUSABLE is not set and this flag is set, then the window will behave as if it doesn't need to interact with the input method and can be placed to use more space and cover the input method.