Define out the hwbinder death notifier code for libgui

This code is only needed for the NO_BINDER version of
libgui (libgui_bufferqueue_static). For libgui, the notifier
is linked inside the connect/disconnect call of BufferQueue
itself.

bug: 149345887
test: Android Auto team helped test it on Auto devices to fix the bug.
Change-Id: I29ab83b9119729e3b878ace439086e87d9c585f6