Staging: android: binder: Fix memory leak on thread/process exit

If a thread or process exited while a reply, one-way transaction or
death notification was pending, the struct holding the pending work
was leaked.

Change-Id: I2eaafaba1c0ecda3ec0872d449dc16d0721c21e7
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>